Merge pull request #1051 from nschloe/fix-discord-link

fix discord link

Author: nschloe

README.md

@@ -11,7 +11,7 @@
 [![GitHub stars](https://img.shields.io/github/stars/nschloe/meshio.svg?style=flat-square&logo=github&label=Stars&logoColor=white)](https://github.com/nschloe/meshio)
 [![PyPi downloads](https://img.shields.io/pypi/dm/meshio.svg?style=flat-square)](https://pypistats.org/packages/meshio)
 
-[![Discord](https://img.shields.io/static/v1?logo=discord&label=chat&message=on%20discord&color=7289da&style=flat-square)](https://discord.com/channels/818781969562599434/818794872604459029)
+[![Discord](https://img.shields.io/static/v1?logo=discord&label=chat&message=on%20discord&color=7289da&style=flat-square)](https://discord.gg/hnTJ5MRX2Y)
 
 [![gh-actions](https://img.shields.io/github/workflow/status/nschloe/meshio/ci?style=flat-square)](https://github.com/nschloe/meshio/actions?query=workflow%3Aci)
 [![codecov](https://img.shields.io/codecov/c/github/nschloe/meshio.svg?style=flat-square)](https://codecov.io/gh/nschloe/meshio)