Update requests requirement from ~=2.27.1 to ~=2.28.1

Updates the requirements on [requests](https://github.com/psf/requests) to permit the latest version.
- [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/v2.27.1...v2.28.1)

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

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

requirements.txt

@@ -3,7 +3,7 @@ python-dotenv~=0.20.0
 APScheduler~=3.9.1
 SQLAlchemy~=1.4.37
 pymysql==1.0.2
-requests~=2.27.1
+requests~=2.28.1
 beautifulsoup4~=4.11.1
 pandas~=1.4.2
 PyVirtualDisplay~=3.0