chore(deps): bump platformdirs from 4.9.4 to 4.9.6 in /hack/api-docs (#6219)

Bumps [platformdirs](https://github.com/tox-dev/platformdirs) from 4.9.4 to 4.9.6.
- [Release notes](https://github.com/tox-dev/platformdirs/releases)
- [Changelog](https://github.com/tox-dev/platformdirs/blob/main/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/platformdirs/compare/4.9.4...4.9.6)

---
updated-dependencies:
- dependency-name: platformdirs
  dependency-version: 4.9.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

hack/api-docs/requirements.txt

@@ -25,7 +25,7 @@ packaging==26.0
 paginate==0.5.7
 pathspec==1.0.4
 pep562==1.1
-platformdirs==4.9.4
+platformdirs==4.9.6
 Pygments==2.20.0
 pymdown-extensions==10.21.2
 python-dateutil==2.9.0.post0