Add Discord badge to README

Added a Discord join badge link to the README.

Author: JhaSourav07

README.md

@@ -16,6 +16,8 @@
 
 ![CommitPulse Live Demo](https://commitpulse.vercel.app/api/streak?user=jhasourav07&theme=neon)
 
+[![Join CommitPulse Discord](https://img.shields.io/badge/Join-CommitPulse%20Discord-5865F2?style=for-the-badge&logo=discord&logoColor=white)](https://discord.gg/Cb73bS79j)
+
 ```md
 ![CommitPulse](https://commitpulse.vercel.app/api/streak?user=YOUR_USERNAME)
 ```