chore: bump otto-de/purge-deprecated-workflow-runs from 3.0.3 to 3.0.4 (#97)

Bumps [otto-de/purge-deprecated-workflow-runs](https://github.com/otto-de/purge-deprecated-workflow-runs) from 3.0.3 to 3.0.4.
- [Release notes](https://github.com/otto-de/purge-deprecated-workflow-runs/releases)
- [Commits](otto-de/purge-deprecated-workflow-runs@aace017...6fcf966)

---
updated-dependencies:
- dependency-name: otto-de/purge-deprecated-workflow-runs
  dependency-version: 3.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/purge-deprecated-workflow-runs.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Purge Deprecated Workflow Runs
-        uses: otto-de/purge-deprecated-workflow-runs@aace01752caac2b45990c06aa876a3755a5b7813  # v 3.0.3
+        uses: otto-de/purge-deprecated-workflow-runs@6fcf966b89e5907a9965946adb9a9d89dc312220  # v 3.0.4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           remove-obsolete: true