pip stable: update platformdirs requirement from ~=4.2.0 to ~=4.2.1

Updates the requirements on [platformdirs](https://github.com/platformdirs/platformdirs) to permit the latest version.
- [Release notes](https://github.com/platformdirs/platformdirs/releases)
- [Changelog](https://github.com/platformdirs/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@4.2.0...4.2.1)

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

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

requirements.txt

@@ -4,7 +4,7 @@ google-auth-httplib2~=0.2.0
 google-auth-oauthlib~=1.2.0
 
 # files
-platformdirs~=4.2.0
+platformdirs~=4.2.1
 
 # compatibility
 importlib_resources>=5