Bump requests from 2.28.2 to 2.31.0 in /docs (#440)

Bumps [requests](https://github.com/psf/requests) from 2.28.2 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@v2.28.2...v2.31.0)

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

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

docs/requirements.txt

@@ -56,7 +56,7 @@ pyrsistent==0.19.3
 python-dateutil==2.8.2
 PyYAML==6.0
 pyzmq==25.0.2
-requests==2.28.2
+requests==2.31.0
 six==1.16.0
 snowballstemmer==2.2.0
 soupsieve==2.4