Bump platformdirs from 4.2.0 to 4.2.1

Bumps [platformdirs](https://github.com/platformdirs/platformdirs) from 4.2.0 to 4.2.1.
- [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:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -32,7 +32,7 @@ packaging==24.0 ; python_version >= '3.7'
 
 pathlib2==2.3.7.post1
 
-platformdirs==4.2.0 ; python_version >= '3.7'
+platformdirs==4.2.1 ; python_version >= '3.7'
 
 pylint==3.1.0