pip: (deps): bump gunicorn from 25.1.0 to 25.3.0

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 25.1.0 to 25.3.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@25.1.0...25.3.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-version: 25.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-prod.txt

@@ -28,7 +28,7 @@ et-xmlfile==2.0.0
 exceptiongroup==1.3.1
 filelock==3.25.2
 grimp==3.14
-gunicorn==25.1.0
+gunicorn==25.3.0
 html5lib==1.1
 identify==2.6.18
 idna==3.11