Bump otto-de/purge-deprecated-workflow-runs in /.github/workflows

Bumps [otto-de/purge-deprecated-workflow-runs](https://github.com/otto-de/purge-deprecated-workflow-runs) from 2.2.0 to 3.0.0.
- [Release notes](https://github.com/otto-de/purge-deprecated-workflow-runs/releases)
- [Commits](otto-de/purge-deprecated-workflow-runs@v2.2.0...v3.0.0)

---
updated-dependencies:
- dependency-name: otto-de/purge-deprecated-workflow-runs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/housekeeping.yaml

@@ -23,7 +23,7 @@ jobs:
           keep_minimum_runs: 25
 
       - name: Delete unused workflow runs
-        uses: otto-de/purge-deprecated-workflow-runs@v2.2.0
+        uses: otto-de/purge-deprecated-workflow-runs@v3.0.0
         with:
           token: ${{ github.token }}