Add a pipe so that images are not concatenated (#1080)

Author: grahamalama

.github/workflows/build-publish.yaml

@@ -45,7 +45,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: 
+          images: |
             ${{ github.repository }}
             ${{ env.GAR_LOCATION }}-docker.pkg.dev/${{ env.GCP_PROJECT_ID }}/${{ env.GAR_REPOSITORY }}/${{ env.IMAGE }}
           # https://github.com/marketplace/actions/docker-metadata-action#tags-input