Bump requests from 2.32.2 to 2.32.4 in /app/backend

Bumps [requests](https://github.com/psf/requests) from 2.32.2 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@v2.32.2...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]

app/backend/requirements.txt

@@ -31,7 +31,7 @@ priority==2.0.0
 pycparser==2.21
 PyJWT==2.8.0
 Quart==0.20.0
-requests==2.32.2
+requests==2.32.4
 six==1.16.0
 typing_extensions==4.9.0
 urllib3==2.5.0