Bump requests from 2.27.1 to 2.28.1

Bumps [requests](https://github.com/psf/requests) from 2.27.1 to 2.28.1.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.27.1...v2.28.1)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -29,7 +29,7 @@ PyYAML = "^6.0"
 flask = "^2.1.2"
 gunicorn = "^20.1.0"
 python-memcached = "^1.59"
-requests = "^2.26.0"
+requests = "^2.28.1"
 python-dateutil = "^2.8.2"
 fedora-messaging = "^2.1.0"