build(deps): bump platformdirs from 4.9.2 to 4.9.4 in /docs

Bumps [platformdirs](https://github.com/tox-dev/platformdirs) from 4.9.2 to 4.9.4.
- [Release notes](https://github.com/tox-dev/platformdirs/releases)
- [Changelog](https://github.com/tox-dev/platformdirs/blob/main/docs/changelog.rst)
- [Commits](tox-dev/platformdirs@4.9.2...4.9.4)

---
updated-dependencies:
- dependency-name: platformdirs
  dependency-version: 4.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -127,7 +127,7 @@ pathspec==1.0.4
     # via
     #   mkdocs
     #   mypy
-platformdirs==4.9.2
+platformdirs==4.9.4
     # via mkdocs-get-deps
 pluggy==1.6.0
     # via