Bump werkzeug from 3.0.4 to 3.0.6 in /flask-app

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 3.0.4 to 3.0.6.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.0.4...3.0.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

flask-app/mtw_requirements.txt

@@ -26,7 +26,7 @@ requests_futures==1.0.1
 setuptools==75.2.0
 urllib3==1.26.20
 waitress==3.0.0
-Werkzeug==3.0.4
+Werkzeug==3.0.6
 wheel==0.44.0
 ### (optional) If building for Windows:
 pyinstaller==6.11.0; sys_platform == "win32"