Bump gunicorn from 21.2.0 to 22.0.0

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>

requirements.txt

@@ -7,5 +7,5 @@ rdflib==7.0.0
 requests==2.31.0
 SPARQLTransformer==2.3.0
 PyGithub==2.1.1
-gunicorn==21.2.0; sys_platform!="win32"
+gunicorn==22.0.0; sys_platform!="win32"
 waitress>=1.4.2; sys_platform=="win32"