Bump platformdirs from 4.4.0 to 4.5.1

Bumps [platformdirs](https://github.com/tox-dev/platformdirs) from 4.4.0 to 4.5.1.
- [Release notes](https://github.com/tox-dev/platformdirs/releases)
- [Changelog](https://github.com/tox-dev/platformdirs/blob/main/CHANGES.rst)
- [Commits](tox-dev/platformdirs@4.4.0...4.5.1)

---
updated-dependencies:
- dependency-name: platformdirs
  dependency-version: 4.5.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -20,7 +20,7 @@ dependencies = [
     "textual==6.1.0",
     "pygithub==2.8.1",
     "pyyaml==6.0.2",
-    "platformdirs==4.4.0",
+    "platformdirs==4.5.1",
     "babel==2.17.0",
 ]