Bump gunicorn from 19.10.0 to 22.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.10.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@19.10.0...22.0.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -13,7 +13,7 @@ https://trac-hacks.org/browser/xmlrpcplugin/trunk?rev=18591&format=zip
 # No pypi release compatible with trac 1.6 yet
 trac-github[oauth] @ git+https://github.com/bmispelon/[email protected]
 
-gunicorn==19.10.0
+gunicorn==22.0.0
 sentry-sdk==1.40.4
 
 -e ./DjangoPlugin