Bump gunicorn from 20.1.0 to 22.0.0 (#100)

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.1.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.1.0...22.0.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -8,7 +8,7 @@ Flask-Dance[sqla]==6.2.0
 flask-login==0.6.0
 Flask-SQLAlchemy==2.5.1
 gevent==23.9.1
-gunicorn==20.1.0
+gunicorn==22.0.0
 language-detector>=5.0.2
 mistune==2.0.4
 mysqlclient>=2.1.0