Add Discord community link to README

Added a link to join the Discord community for users.

Author: zhravan

README.md

@@ -4,6 +4,12 @@
     <h6 align="center">Rustlings‑style Go exercises in a tiny CLI.</h6>
 </p>
 
+<div align="center">
+    <a href="https://discord.gg/JCKzJcb24r"> Join our discord community </a>
+</div>
+
+<br>
+
 <div align="center">
     <img src="https://img.shields.io/badge/Built%20with%20%E2%9D%A4%EF%B8%8F-for%20learning%20and%20knowledge%20sharing-blueviolet"/>
 </div>