Replace broken link to AMD product specs

This new link isn't exactly to the product spec and seems like it may also be fragile. But the actual AMD product spec doesn't seem to list codec support anymore, so https://www.amd.com/en/products/specifications/processors.html

docs/general/administration/hardware-acceleration/amd.md

@@ -61,7 +61,7 @@ Most AMD dGPUs come with video encoders but be careful with certain models - RX
 
 AMD Ryzen APU (G/GE/H/HS/HX suffixed models) and Zen 4 based processors have integrated graphics.
 
-Best to check the video codec support via the [AMD product specifications](https://www.amd.com/en/products/specifications) before buying a GPU for hardware acceleration.
+Best to check the video codec support via the [AMD product specifications](https://www.amd.com/en/products/graphics/radeon-for-creators/video-editing.html#tabs-b6a36ad588-item-0cb6dbfc4b-tab) before buying a GPU for hardware acceleration.
 
 ### Transcode H.264