Cleanup Periphery (#72)

# Cleanup Periphery

## ⚙️ Release Notes 
- Cleanup Periphery

## 📝 Code of Conduct & Contributing Guidelines 

By submitting creating this pull request, you agree to follow our [Code
of
Conduct](https://github.com/StanfordSpezi/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordSpezi/.github/blob/main/CONTRIBUTING.md):
- [x] I agree to follow the [Code of
Conduct](https://github.com/StanfordSpezi/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/StanfordSpezi/.github/blob/main/CONTRIBUTING.md).

.github/workflows/periphery.yml

@@ -55,3 +55,6 @@ jobs:
     - name: Run periphery
       run: |
         periphery scan --relative-results --format github-actions --strict -- -skipPackagePluginValidation -skipMacroValidation
+    - name: Cleanup periphery
+      if: always()
+      run: rm -rf ~/Library/Caches/com.github.peripheryapp