Bump requests from 2.32.0 to 2.32.4 in /sample-apps/flask

Bumps [requests](https://github.com/psf/requests) from 2.32.0 to 2.32.4.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.32.0...v2.32.4)

---
updated-dependencies:
- dependency-name: requests
  dependency-version: 2.32.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

sample-apps/flask/requirements.txt

@@ -3,7 +3,7 @@ certifi==2024.7.4
 chardet==5.2.0
 Flask==2.3.3
 idna==3.7
-requests==2.32.0
+requests==2.32.4
 urllib3==1.26.19
 Werkzeug==3.0.6
 flask-sqlalchemy==2.5.1