Fix HUB link https://ultralytics.com/hub (#2233)

Refactor code for speed and clarity

README.md

@@ -35,7 +35,7 @@ To request an Enterprise License please complete the form at [Ultralytics Licens
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
   <a href="https://www.tiktok.com/@ultralytics"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-tiktok.png" width="2%" alt="Ultralytics TikTok"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
-  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="2%" alt="Ultralytics Instagram"></a>
+  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="2%" alt="Ultralytics BiliBili"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
   <a href="https://ultralytics.com/discord"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-discord.png" width="2%" alt="Ultralytics Discord"></a>
 </div>
@@ -161,7 +161,7 @@ python train.py --data coco.yaml --epochs 300 --weights '' --cfg yolov5n.yaml  -
 ## <div align="center">Integrations</div>
 
 <br>
-<a align="center" href="https://bit.ly/ultralytics_hub" target="_blank">
+<a align="center" href="https://ultralytics.com/hub" target="_blank">
 <img width="100%" src="https://github.com/ultralytics/assets/raw/main/yolov3/banner-integrations.png"></a>
 <br>
 <br>
@@ -186,9 +186,9 @@ python train.py --data coco.yaml --epochs 300 --weights '' --cfg yolov5n.yaml  -
 
 ## <div align="center">Ultralytics HUB</div>
 
-Experience seamless AI with [Ultralytics HUB](https://bit.ly/ultralytics_hub) ⭐, the all-in-one solution for data visualization, YOLO 🚀 model training and deployment, without any coding. Transform images into actionable insights and bring your AI visions to life with ease using our cutting-edge platform and user-friendly [Ultralytics App](https://ultralytics.com/app_install). Start your journey for **Free** now!
+Experience seamless AI with [Ultralytics HUB](https://ultralytics.com/hub) ⭐, the all-in-one solution for data visualization, YOLO 🚀 model training and deployment, without any coding. Transform images into actionable insights and bring your AI visions to life with ease using our cutting-edge platform and user-friendly [Ultralytics App](https://ultralytics.com/app_install). Start your journey for **Free** now!
 
-<a align="center" href="https://bit.ly/ultralytics_hub" target="_blank">
+<a align="center" href="https://ultralytics.com/hub" target="_blank">
 <img width="100%" src="https://github.com/ultralytics/assets/raw/main/im/ultralytics-hub.png"></a>
 
 ## <div align="center">Why YOLOv3</div>
@@ -459,7 +459,7 @@ For YOLOv3 bug reports and feature requests please visit [GitHub Issues](https:/
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
   <a href="https://www.tiktok.com/@ultralytics"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-tiktok.png" width="3%" alt="Ultralytics TikTok"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
-  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="3%" alt="Ultralytics Instagram"></a>
+  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="3%" alt="Ultralytics BiliBili"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
   <a href="https://ultralytics.com/discord"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-discord.png" width="3%" alt="Ultralytics Discord"></a>
 </div>

README.zh-CN.md

@@ -35,7 +35,7 @@ YOLOv3 🚀 是世界上最受欢迎的视觉 AI，代表<a href="https://ultral
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
   <a href="https://www.tiktok.com/@ultralytics"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-tiktok.png" width="2%" alt="Ultralytics TikTok"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
-  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="2%" alt="Ultralytics Instagram"></a>
+  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="2%" alt="Ultralytics BiliBili"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="2%">
   <a href="https://ultralytics.com/discord"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-discord.png" width="2%" alt="Ultralytics Discord"></a>
 </div>
@@ -160,7 +160,7 @@ python train.py --data coco.yaml --epochs 300 --weights '' --cfg yolov5n.yaml  -
 ## <div align="center">模块集成</div>
 
 <br>
-<a align="center" href="https://bit.ly/ultralytics_hub" target="_blank">
+<a align="center" href="https://ultralytics.com/hub" target="_blank">
 <img width="100%" src="https://github.com/ultralytics/assets/raw/main/yolov3/banner-integrations.png"></a>
 <br>
 <br>
@@ -185,9 +185,9 @@ python train.py --data coco.yaml --epochs 300 --weights '' --cfg yolov5n.yaml  -
 
 ## <div align="center">Ultralytics HUB</div>
 
-[Ultralytics HUB](https://bit.ly/ultralytics_hub) 是我们的⭐**新的**用于可视化数据集、训练 YOLOv3 🚀 模型并以无缝体验部署到现实世界的无代码解决方案。现在开始 **免费** 使用他！
+[Ultralytics HUB](https://ultralytics.com/hub) 是我们的⭐**新的**用于可视化数据集、训练 YOLOv3 🚀 模型并以无缝体验部署到现实世界的无代码解决方案。现在开始 **免费** 使用他！
 
-<a align="center" href="https://bit.ly/ultralytics_hub" target="_blank">
+<a align="center" href="https://ultralytics.com/hub" target="_blank">
 <img width="100%" src="https://github.com/ultralytics/assets/raw/main/im/ultralytics-hub.png"></a>
 
 ## <div align="center">为什么选择 YOLOv3</div>
@@ -459,7 +459,7 @@ Ultralytics 提供两种许可证选项以适应各种使用场景：
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
   <a href="https://www.tiktok.com/@ultralytics"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-tiktok.png" width="3%" alt="Ultralytics TikTok"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
-  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="3%" alt="Ultralytics Instagram"></a>
+  <a href="https://ultralytics.com/bilibili"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-bilibili.png" width="3%" alt="Ultralytics BiliBili"></a>
   <img src="https://github.com/ultralytics/assets/raw/main/social/logo-transparent.png" width="3%">
   <a href="https://ultralytics.com/discord"><img src="https://github.com/ultralytics/assets/raw/main/social/logo-social-discord.png" width="3%" alt="Ultralytics Discord"></a>
 </div>

tutorial.ipynb

@@ -254,7 +254,7 @@
       "source": [
         "# 3. Train\n",
         "\n",
-        "<p align=\"\"><a href=\"https://bit.ly/ultralytics_hub\"><img width=\"1000\" src=\"https://github.com/ultralytics/assets/raw/main/im/integrations-loop.png\"/></a></p>\n",
+        "<p align=\"\"><a href=\"https://ultralytics.com/hub\"><img width=\"1000\" src=\"https://github.com/ultralytics/assets/raw/main/im/integrations-loop.png\"/></a></p>\n",
         "Close the active learning loop by sampling images from your inference conditions with the `roboflow` pip package\n",
         "<br><br>\n",
         "\n",