Bump rsa from 4.5 to 4.7

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 4.5 to 4.7.
- [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-4.5...version-4.7)

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 opps
-rsa==4.5 # python 2 support
+rsa==4.7 # python 2 support
 google-api-python-client==1.4.0
 pyOpenSSL==16.2.0
 oauth2client==1.5.2