chore: bump gunicorn from 21.2.0 to 22.0.0 in /git_services

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] <support@github.com>

Author: dependabot[bot]

git_services/poetry.lock

@@ -12,7 +12,7 @@ json-rpc = "^1.14.0"
 sentry-sdk = {extras = ["flask"], version = "^1.44.1"}
 Flask = "2.2.5"
 gevent = "^23.9.0"
-gunicorn = "^21.2.0"
+gunicorn = "^22.0.0"
 renku = "2.9.2"
 
 [tool.poetry.dev-dependencies]