Bump gunicorn from 20.1.0 to 22.0.0 in /frameworks/Python/blacksheep

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

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

Signed-off-by: dependabot[bot] <[email protected]>

frameworks/Python/blacksheep/requirements-gunicorn.txt

@@ -1 +1 @@
-gunicorn==20.1.0
+gunicorn==22.0.0