Bump gunicorn from 20.0.4 to 22.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.0.4 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.0.4...22.0.0)

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

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

requirements.txt

@@ -38,7 +38,7 @@ feedparser==6.0.2
 filelock==3.0.12
 ghostscript==0.7
 google-currency==1.0.9
-gunicorn==20.0.4
+gunicorn==22.0.0
 h11==0.12.0
 httpcore==0.15.0
 httpx==0.23.0