Bump platformdirs from 3.8.1 to 3.9.1 (#879)

Bumps [platformdirs](https://github.com/platformdirs/platformdirs) from 3.8.1 to 3.9.1.
- [Release notes](https://github.com/platformdirs/platformdirs/releases)
- [Changelog](https://github.com/platformdirs/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@3.8.1...3.9.1)

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

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

requirements.txt

@@ -5,7 +5,7 @@ fnvhash==0.1.0
 httpx==0.24.1
 hypercorn==0.14.4
 packaging==23.1
-platformdirs==3.8.1
+platformdirs==3.9.1
 pyperclip==1.8.2
 pyserde==0.11.1
 requests==2.31.0