apply copilot review suggestions

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Lennart Reiher <lreiher@me.com>

Author: lreiher

.github/workflows/ghcr-cleanup.yml

@@ -61,7 +61,7 @@ jobs:
           delete-orphaned-images: true
           validate: true
       - name: Cleanup ${{ github.repository }}/compose
-        if: inputs.cleanup-compose
+        if: ${{ inputs['cleanup-compose'] }}
         uses: dataaxiom/ghcr-cleanup-action@v1.2.2
         with:
           packages: ${{ github.event.repository.name }}/compose
@@ -77,7 +77,7 @@ jobs:
           delete-orphaned-images: true
           validate: true
       - name: Cleanup ${{ github.event.repository.name }}/helm/${{ steps.package.outputs.helm_chart_name }}
-        if: inputs.cleanup-helm
+        if: ${{ inputs['cleanup-helm'] }}
         uses: dataaxiom/ghcr-cleanup-action@v1.2.2
         with:
           packages: ${{ github.event.repository.name }}/helm/${{ steps.package.outputs.helm_chart_name }}