docker: update package cleanup settings

Change the package name format for GitHub Packages cleanup to include the registry URL and increase the minimum versions to keep from 1 to 5.

Signed-off-by: Chiho Sin <[email protected]>

Author: chihosin

.github/workflows/docker_build.yml

@@ -90,7 +90,7 @@ jobs:
         if: ${{ inputs.push }}
         uses: actions/delete-package-versions@v4
         with:
-          package-name: ${{ github.repository }}
+          package-name: ghcr.io/${{ github.repository }}
           package-type: container
-          min-versions-to-keep: 1
+          min-versions-to-keep: 5
           delete-only-untagged-versions: true