Build(deps): Bump gunicorn from 19.9.0 to 22.0.0 in /requirements

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 19.9.0 to 22.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](https://github.com/benoitc/gunicorn/compare/19.9.0...22.0.0)

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

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

requirements/requirements.txt

@@ -24,7 +24,7 @@ python-magic==0.4.15
 unipath==1.1
 WeasyPrint==51
 Pillow==10.0.1
-gunicorn==19.9.0
+gunicorn==22.0.0
 more-itertools==8.2.0
 pysolr==3.6.0
 PyPDF4==1.27.0