chore(deps): bump werkzeug in /tests/apps/python-flask

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 2.2.3 to 2.3.1.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/2.3.1/CHANGES.rst)
- [Commits](https://github.com/pallets/werkzeug/compare/2.2.3...2.3.1)

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

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

tests/apps/python-flask/requirements.txt

@@ -1,5 +1,5 @@
 Flask==2.2.3
 Jinja2==3.1.2
-Werkzeug==2.2.3
+Werkzeug==2.3.1
 gunicorn==20.1.0