Update gunicorn requirement from ~=21.2.0 to ~=22.0.0

Updates the requirements on [gunicorn](https://github.com/benoitc/gunicorn) to permit the latest version.
- [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

@@ -14,7 +14,7 @@ python-decouple~=3.8
 python-dateutil~=2.8.2
 boto3~=1.28.10
 django-storages~=1.13
-gunicorn~=21.2.0
+gunicorn~=22.0.0
 psycopg2-binary~=2.9.5
 sentry-sdk~=1.44.0
 ddtrace~=2.7.0