chore(ci): Try simpler syntax

Author: xmatthias

.github/workflows/packages-cleanup.yml

@@ -35,7 +35,7 @@ jobs:
     - name: "Delete untagged Package Versions"
       uses: actions/delete-package-versions@v5
       with:
-        package-name: ${{ github.event.inputs.package_name || env.PACKAGE_NAME }}
+        package-name: ${{ inputs.package_name || env.PACKAGE_NAME }}
         package-type: 'container'
         min-versions-to-keep: 10
-        delete-only-untagged-versions: ${{ github.event.inputs.delete-untagged || 'true' }}
+        delete-only-untagged-versions: ${{ inputs.delete-untagged || 'true' }}