Enable container image publishing on this branch

Just for testing. This will be revoked before merging this branch.

Author: ptsOSL

.github/workflows/_container.yml

@@ -51,7 +51,7 @@ jobs:
             type=raw,value=latest
 
       - name: Push cached image to container registry
-        if: inputs.publish && github.ref_type == 'tag'
+        if: inputs.publish && (github.ref_type == 'tag' || github.ref_name == 'copier-update')
         uses: docker/build-push-action@v6
         env:
           DOCKER_BUILD_RECORD_UPLOAD: false