Bump werkzeug from 3.0.1 to 3.0.3 in /examples/docker-flask (#641)

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](https://github.com/pallets/werkzeug/compare/3.0.1...3.0.3)

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

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

examples/docker-flask/requirements.txt

@@ -17,4 +17,4 @@ PyYAML==6.0
 qrcode==7.4.2
 six==1.16.0
 typing_extensions==4.5.0
-Werkzeug==3.0.1
+Werkzeug==3.0.3