Bump gevent from 25.5.1 to 25.9.1 (#805)

Bumps [gevent](https://github.com/gevent/gevent) from 25.5.1 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](gevent/gevent@25.5.1...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -22,7 +22,7 @@ django==4.2.23
     #   screamshotter (setup.py)
 djangorestframework==3.16.0
     # via screamshotter (setup.py)
-gevent==25.5.1
+gevent==25.9.1
     # via gunicorn
 greenlet==3.2.3
     # via gevent