Bump platformdirs from 4.2.0 to 4.2.1 (#79)

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:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -10,7 +10,7 @@ mccabe==0.7.0
 mypy-extensions==1.0.0
 packaging==24.0
 pathspec==0.12.1
-platformdirs==4.2.0
+platformdirs==4.2.1
 pluggy==1.5.0
 py==1.11.0
 pycodestyle==2.11.1