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

@@ -13,7 +13,7 @@ dependencies = [
     "databases[asyncpg]==0.9.0",
     "fastapi==0.128.0",
     "fastapi-sso==0.19.0",
-    "gunicorn==23.0.0",
+    "gunicorn==24.1.1",
     "heliclockter==3.0.1",
     "parameterized==0.9.0",
     "passlib==1.7.4",