chore(deps-dev): bump platformdirs from 4.2.0 to 4.2.1 in /requirements

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] <[email protected]>

requirements/development.txt

@@ -7,7 +7,7 @@ watchfiles==0.21.0                  # https://github.com/samuelcolvin/watchfiles
 Werkzeug==3.0.2                     # https://github.com/pallets/werkzeug
 django-extensions==3.2.3            # https://github.com/django-extensions/django-extensions
 django-debug-toolbar==4.3.0         # https://github.com/jazzband/django-debug-toolbar
-platformdirs==4.2.0                 # https://github.com/platformdirs/platformdirs
+platformdirs==4.2.1                 # https://github.com/platformdirs/platformdirs
 ruff==0.4.2                         # https://github.com/astral-sh/ruff
 pre-commit==3.7.0                   # https://github.com/pre-commit/pre-commit