add Discord image shield

Author: Jason2866

README.md

@@ -2,6 +2,7 @@
 # Fork of Platformio Espressif 32: development platform for [PlatformIO](https://platformio.org)
 
 [![Build Status](https://github.com/pioarduino/platform-espressif32/workflows/Examples/badge.svg)](https://github.com/pioarduino/platform-espressif32/actions)
+[![Discord](https://img.shields.io/discord/1263397951829708871.svg?logo=discord&logoColor=white&color=5865F2&label=Discord)](https://discord.gg/ZvwxZuzY)
 [![GitHub Releases](https://img.shields.io/github/downloads/pioarduino/platform-espressif32/total?label=downloads)](https://github.com/pioarduino/platform-espressif32/releases/latest)
 
 > [!NOTE]