Bump rsa from 4.7.2 to 4.8

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 4.7.2 to 4.8.
- [Release notes](https://github.com/sybrenstuvel/python-rsa/releases)
- [Changelog](https://github.com/sybrenstuvel/python-rsa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sybrenstuvel/python-rsa/compare/version-4.7.2...version-4.8)

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

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

requirements.txt

@@ -26,7 +26,7 @@ pyasn1-modules==0.2.8
 pylint==2.11.1
 pytz==2021.3
 requests==2.26.0
-rsa==4.7.2
+rsa==4.8
 six==1.16.0
 sqlparse==0.4.2
 toml==0.10.2