Bump requests from 2.20.0 to 2.31.0 in /data/421a-service

Bumps [requests](https://github.com/psf/requests) from 2.20.0 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.20.0...v2.31.0)

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

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

data/421a-service/requirements.txt

@@ -1,4 +1,4 @@
-requests==2.20.0
+requests==2.31.0
 beautifulsoup4==4.6.3
 xlrd==1.1.0
 pytest==3.8.0