docs: Fix gitter link

Author: pawamoy

README.md

@@ -4,7 +4,7 @@
 [![documentation](https://img.shields.io/badge/docs-mkdocs%20material-blue.svg?style=flat)](https://mkdocstrings.github.io/python-legacy/)
 [![pypi version](https://img.shields.io/pypi/v/mkdocstrings-python-legacy.svg)](https://pypi.org/project/mkdocstrings-python-legacy/)
 [![gitpod](https://img.shields.io/badge/gitpod-workspace-blue.svg?style=flat)](https://gitpod.io/#https://github.com/mkdocstrings/python-legacy)
-[![gitter](https://badges.gitter.im/join%20chat.svg)](https://gitter.im/mkdocstrings/community)
+[![gitter](https://badges.gitter.im/join%20chat.svg)](https://gitter.im/mkdocstrings/python-legacy)
 
 A legacy Python handler for mkdocstrings.