chore(deps): bump requests from 2.27.1 to 2.28.0

Bumps [requests](https://github.com/psf/requests) from 2.27.1 to 2.28.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.27.1...v2.28.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -3,5 +3,5 @@ Django==3.2.13
 django-csp==3.7
 git+https://github.com/cal-itp/eligibility-api#egg=eligibility_api
 gunicorn==20.1.0
-requests==2.27.1
+requests==2.28.0
 six==1.16.0