Bump werkzeug from 3.0.1 to 3.0.3 in /examples/flask/app (#457)

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 3.0.1 to 3.0.3.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.0.1...3.0.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/flask/app/requirements.txt

@@ -6,5 +6,5 @@ importlib-metadata==6.6.0
 itsdangerous==2.1.2
 Jinja2==3.1.4
 MarkupSafe==2.1.2
-Werkzeug==3.0.1
+Werkzeug==3.0.3
 zipp==3.15.0