Bump requests from 2.28.1 to 2.31.0 in /docs (#17669)

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](https://github.com/psf/requests/compare/v2.28.1...v2.31.0)

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

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

docs/requirements.txt

@@ -26,7 +26,7 @@ pytest-html==3.1.1
 pytest-metadata==1.11.0
 py>=1.9.0
 pytz==2022.7
-requests==2.28.1
+requests==2.31.0
 six==1.15.0
 snowballstemmer==2.1.0
 soupsieve==2.2.1