Bump gevent from 25.8.2 to 25.9.1 in /requirements

Bumps [gevent](https://github.com/gevent/gevent) from 25.8.2 to 25.9.1.
- [Release notes](https://github.com/gevent/gevent/releases)
- [Changelog](https://github.com/gevent/gevent/blob/master/docs/changelog_pre.rst)
- [Commits](https://github.com/gevent/gevent/compare/25.8.2...25.9.1)

---
updated-dependencies:
- dependency-name: gevent
  dependency-version: 25.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/prod.txt

@@ -12,7 +12,7 @@ loguru==0.7.3
 requests==2.32.5
 
 # Deployment
-gevent==25.8.2
+gevent==25.9.1
 gunicorn>=19.9.0
 supervisor==4.3.0