Bump werkzeug from 3.0.3 to 3.0.6 in /examples/flask/app (#534)

Author: dependabot[bot]

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==3.0.3
+Werkzeug==3.0.6
 zipp==3.19.1