ci: test docker push

Author: juanrgm

.github/workflows/ci.yaml

@@ -70,7 +70,7 @@ jobs:
         name: Build image metadata
         uses: docker/metadata-action@v3
         with:
-          images: ghcr.io/${{ github.repository }}
+          images: ghcr.io/${{ github.repository }}/test
           tags: |-
             type=schedule
             type=ref,event=branch