Bump requests from 2.26.0 to 2.31.0

Bumps [requests](https://github.com/psf/requests) from 2.26.0 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@v2.26.0...v2.31.0)

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

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

requirements.txt

@@ -35,7 +35,7 @@ pytest-faulthandler==2.0.1
 pytest-random-order==1.0.4
 pytz==2019.2
 readme-renderer==24.0
-requests==2.26.0
+requests==2.31.0
 requests-toolbelt==0.9.1
 semver==2.13.0
 six==1.12.0