Bump werkzeug from 3.0.6 to 3.1.4 in /sample-apps/flask

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 3.0.6 to 3.1.4.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.0.6...3.1.4)

---
updated-dependencies:
- dependency-name: werkzeug
  dependency-version: 3.1.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

sample-apps/flask/requirements.txt

@@ -5,7 +5,7 @@ Flask==2.3.3
 idna==3.7
 requests==2.32.0
 urllib3==1.26.19
-Werkzeug==3.0.6
+Werkzeug==3.1.4
 flask-sqlalchemy==2.5.1
 SQLAlchemy==1.4
 aws_xray_sdk==2.6.0