Bump rsa from 3.4.2 to 4.7 in /requirements

Bumps [rsa](https://github.com/sybrenstuvel/python-rsa) from 3.4.2 to 4.7.
- [Changelog](https://github.com/sybrenstuvel/python-rsa/blob/main/CHANGELOG.md)
- [Commits](sybrenstuvel/python-rsa@version-3.4.2...version-4.7)

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

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

Author: dependabot[bot]

requirements/docs.txt

@@ -10,5 +10,5 @@ sphinx-notfound-page
 django==3.2.25
 djangorestframework==3.14.0
 django-mptt==0.16.0
-rsa==3.4.2
+rsa==4.7
 ifcfg==0.21