chore(deps): bump rsa from 4.0 to 4.1

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 4.0 to 4.1.
- [Release notes](https://github.com/sybrenstuvel/python-rsa/releases)
- [Changelog](https://github.com/sybrenstuvel/python-rsa/blob/main/CHANGELOG.md)
- [Commits](sybrenstuvel/python-rsa@version-4.0...version-4.1)

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

requirements.txt

@@ -48,7 +48,7 @@ pytz==2018.7
 PyYAML==3.13
 requests==2.20.1
 requests-oauthlib==1.0.0
-rsa==4.0
+rsa==4.1
 ruamel.yaml==0.15.80
 simplejson==3.16.0
 six==1.11.0