build(deps): bump gunicorn from 21.2.0 to 22.0.0

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
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -4,6 +4,6 @@ ping3==4.0.4
 requests==2.31.0
 psycopg2==2.9.6
 pyopenssl==23.2.0
-gunicorn==21.2.0
+gunicorn==22.0.0
 sphinx==6.2.1
 sphinx_rtd_theme==1.2.2