Bump gunicorn from 21.2.0 to 23.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 21.2.0 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@21.2.0...23.0.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 23.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -11,4 +11,4 @@ requests==2.31.0
 sqlalchemy==2.0.23
 flask-sqlalchemy==3.0.5
 wtforms==3.1.0
-gunicorn==21.2.0
+gunicorn==23.0.0