Bump gunicorn from 22.0.0 to 23.0.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 22.0.0 to 23.0.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@22.0.0...23.0.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -8,7 +8,7 @@ dj-database-url==2.1.0
 Django==4.2.18
 django-markdownify==0.9.3
 django-on-heroku==1.1.2
-gunicorn==22.0.0
+gunicorn==23.0.0
 importlib-metadata==6.8.0
 isort==5.12.0
 jsonmerge==1.9.2