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

@@ -205,7 +205,7 @@ raven==6.10.0
     # via -r requirements.in
 redis==4.4.4
     # via -r requirements.in
-requests==2.26.0
+requests==2.31.0
     # via
     #   -r requirements.in
     #   django-munigeo