Fixes the untagged image deletion so it will not remove images which are referred to by a multi-arch manifest image

.github/workflows/cleanup-tags.yml

@@ -40,7 +40,7 @@ jobs:
         name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: "3.9"
+          python-version: "3.10"
       -
         name: Install requests
         run: |