Bump rsa from 3.4.2 to 4.8 in /.circleci

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 3.4.2 to 4.8.
- [Release notes](https://github.com/sybrenstuvel/python-rsa/releases)
- [Changelog](https://github.com/sybrenstuvel/python-rsa/blob/main/CHANGELOG.md)
- [Commits](sybrenstuvel/python-rsa@version-3.4.2...version-4.8)

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

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

Author: dependabot[bot]

.circleci/build-requirements.txt

@@ -3,7 +3,7 @@ slackclient==2.9.3
 pyspellchecker==0.6.2
 ansible==2.8.6
 ansible-runner==1.4.2
-rsa==3.4.2
+rsa==4.8
 paramiko==2.6.0
 pyminizip===0.2.6
 google-cloud-storage==1.29.0