Update README.md

Author: better629

README.md

@@ -15,7 +15,7 @@
 
 <p align="center">
 <a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License: MIT"></a>
-<a href="https://discord.gg/DYn29wFk9z"><img src="https://dcbadge.vercel.app/api/server/DYn29wFk9z?style=flat" alt="Discord Follow"></a>
+<a href="https://discord.gg/DYn29wFk9z"><img src="https://img.shields.io/badge/Join-Discord-gGnrXvVz7a?logo=discord" alt="Discord Follow"></a>
 <a href="https://twitter.com/MetaGPT_"><img src="https://img.shields.io/twitter/follow/MetaGPT?style=social" alt="Twitter Follow"></a>
 </p>