correct link

Author: clach04

Mods/README.md

@@ -18,7 +18,7 @@ As decribed, it involves soldering hand soldering on top of a 0603 component, bu
 
 ![image](https://github.com/witnessmenow/ESP32-Cheap-Yellow-Display/assets/1562562/04b98352-ca41-4bcc-bf77-380db4cce1da)
 
-[Link](https://github.com/hexeguitar/ESP32_TFT_PIO#2-audio-amp-gain-mod)
+[Link](https://github.com/hexeguitar/ESP32_TFT_PIO#audio-amp-gain-mod)
 
 ## Adding PSRAM