Bump platformdirs from 2.5.1 to 2.5.2 (#28)

Bumps [platformdirs](https://github.com/platformdirs/platformdirs) from 2.5.1 to 2.5.2.
- [Release notes](https://github.com/platformdirs/platformdirs/releases)
- [Changelog](https://github.com/platformdirs/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@2.5.1...2.5.2)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -27,7 +27,7 @@ mccabe==0.7.0; python_version >= "3.6"
 mypy-extensions==0.4.3; python_full_version >= "3.6.2"
 packaging==21.3; python_version >= "3.7" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.7"
 pathspec==0.9.0; python_full_version >= "3.6.2"
-platformdirs==2.5.1; python_version >= "3.7" and python_full_version >= "3.6.2"
+platformdirs==2.5.2; python_version >= "3.7" and python_full_version >= "3.6.2"
 pluggy==1.0.0; python_version >= "3.7"
 py==1.11.0; python_version >= "3.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.7"
 pycodestyle==2.8.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"