chore: bump the security group across 1 directory with 2 updates (#858)

Bumps the security group with 2 updates in the /examples/flask/app directory: [flask](https://github.com/pallets/flask) and [werkzeug](https://github.com/pallets/werkzeug).


Updates `flask` from 2.3.2 to 3.1.3
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.3.2...3.1.3)

Updates `werkzeug` from 3.0.6 to 3.1.6
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@3.0.6...3.1.6)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
  dependency-group: security
- dependency-name: werkzeug
  dependency-version: 3.1.6
  dependency-type: direct:production
  dependency-group: security
...

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

Author: dependabot[bot]

examples/flask/app/requirements.txt

@@ -1,10 +1,10 @@
 blinker==1.6.2
 click==8.1.3
-Flask==2.3.2
+Flask==3.1.3
 gunicorn==22.0.0
 importlib-metadata==6.6.0
 itsdangerous==2.1.2
 Jinja2==3.1.6
 MarkupSafe==2.1.2
-Werkzeug==3.0.6
+Werkzeug==3.1.6
 zipp==3.19.1