Updating link to bootloader address

Fix for 1technophile#928

docs/upload/binaries.md

@@ -5,7 +5,7 @@ Nevertheless you will not be able to change advanced parameters, if you want to
 Download the binary corresponding to your board and gateway [here](https://github.com/1technophile/OpenMQTTGateway/releases) from github and uncompress it.
 
 ## ESP32
-* Download the bootloader [here](https://github.com/espressif/arduino-esp32/raw/master/tools/sdk/bin/bootloader_dio_80m.bin)
+* Download the bootloader [here](https://github.com/espressif/arduino-esp32/raw/master/tools/sdk/esp32/bin/bootloader_dio_80m.bin)
 * Download the boot_app0 from [here](https://github.com/espressif/arduino-esp32/raw/master/tools/partitions/boot_app0.bin)
 * Download the flash tool utility from espressif:
 https://www.espressif.com/en/products/hardware/esp32/resources