Bump gunicorn from 21.2.0 to 22.0.0 (#1274)

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 21.2.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@21.2.0...22.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -38,7 +38,7 @@ docutils==0.20
 chardet==5.2.0
 cchardet==2.1.7
 psycopg2==2.9.9
-gunicorn==21.2.0
+gunicorn==22.0.0
 gevent==23.9.1
 django-storages==1.14.2
 Whoosh==2.7.4