chore(deps): bump gunicorn from 23.0.0 to 24.1.1 in /backend

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 23.0.0 to 24.1.1.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@23.0.0...24.1.1)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 24.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -76,7 +76,7 @@ dependencies = [
 
     "uwsgi==2.0.31",
     "Werkzeug==3.1.3",
-    "gunicorn==23.0.0",
+    "gunicorn==24.1.1",
     "gevent-websocket==0.10.1",
 ]