Update requests requirement from ~=2.25.1 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](psf/requests@v2.25.1...v2.28.1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -7,4 +7,4 @@ python-sdk-auth~=0.3.0
 pyudev~=0.22.0
 pyusb~=1.1.1
 psutil~=5.8.0
-requests~=2.25.1
+requests~=2.28.1