Bump python-socketio from 5.8.0 to 5.11.2 in /backend

Bumps [python-socketio](https://github.com/miguelgrinberg/python-socketio) from 5.8.0 to 5.11.2.
- [Release notes](https://github.com/miguelgrinberg/python-socketio/releases)
- [Changelog](https://github.com/miguelgrinberg/python-socketio/blob/main/CHANGES.md)
- [Commits](miguelgrinberg/python-socketio@v5.8.0...v5.11.2)

---
updated-dependencies:
- dependency-name: python-socketio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/requirements.txt

@@ -2,7 +2,7 @@ certifi==2022.12.7
 dnspython==2.3.0
 eventlet==0.33.3
 python-engineio==4.3.4
-python-socketio==5.8.0
+python-socketio==5.11.2
 six==1.16.0
 pytest==7.2.2
 requests==2.31.0