Bump requests from 2.28.1 to 2.31.0

Bumps [requests](https://github.com/psf/requests) from 2.28.1 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@v2.28.1...v2.31.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements.txt

@@ -36,7 +36,7 @@ pyflakes==2.4.0
     # via xml2rfc
 pyyaml==6.0
     # via xml2rfc
-requests==2.28.1
+requests==2.31.0
     # via
     #   google-i18n-address
     #   xml2rfc