docs: fix discord link

Author: bburda

README.md

@@ -4,7 +4,7 @@
 [![GHCR](https://img.shields.io/badge/GHCR-ghcr.io%2Fselfpatch%2Fros2__medkit__mcp-blue?logo=github)](https://github.com/selfpatch/ros2_medkit_mcp/pkgs/container/ros2_medkit_mcp)
 [![Docs](https://img.shields.io/badge/docs-GitHub%20Pages-blue)](https://selfpatch.github.io/ros2_medkit/)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
-[![Discord](https://img.shields.io/badge/Discord-Join%20Us-7289DA?logo=discord&logoColor=white)](https://discord.gg/fEbWKTah)
+[![Discord](https://img.shields.io/badge/Discord-Join%20Us-7289DA?logo=discord&logoColor=white)](https://discord.gg/6CXPMApAyq)
 
 A thin MCP (Model Context Protocol) adapter that connects an LLM to an existing SOVD HTTP API exposed by [ros2_medkit](https://github.com/selfpatch/ros2_medkit).