Bump platformdirs from 4.3.3 to 4.3.6

Bumps [platformdirs](https://github.com/tox-dev/platformdirs) from 4.3.3 to 4.3.6.
- [Release notes](https://github.com/tox-dev/platformdirs/releases)
- [Changelog](https://github.com/tox-dev/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@4.3.3...4.3.6)

---
updated-dependencies:
- dependency-name: platformdirs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -20,7 +20,7 @@ mkdocs-rss-plugin==1.15.0
 packaging==24.1
 paginate==0.5.7
 pathspec==0.12.1
-platformdirs==4.3.3
+platformdirs==4.3.6
 Pygments==2.18.0
 pymdown-extensions==10.9
 python-dateutil==2.9.0.post0