Use github.repository instead

Author: jauderho

.github/workflows/docker-3.0.yml

@@ -34,11 +34,11 @@ jobs:
         id: docker_meta
         uses: docker/metadata-action@v3
         with:
-          images: ${{ env.REPOSITORY }}
+          images: ${{ github.repository }}
           labels: |
             org.opencontainers.image.version=${{ env.BUILD_VERSION }}
             org.opencontainers.image.revision=${{ github.sha }}
-            org.opencontainers.image.title=${{ env.REPOSITORY }}
+            org.opencontainers.image.title=${{ github.repository }}
             
       - name: GitHub login
         if: ${{ github.event_name != 'pull_request' }}
@@ -60,4 +60,4 @@ jobs:
           cache-to: type=gha, scope=${{ github.workflow }}
           labels: ${{ steps.docker_meta.outputs.labels }}
           tags: |
-            ghcr.io/${{ env.REPOSITORY }}:${{ env.BUILD_VERSION }}
+            ghcr.io/${{ github.repository }}:${{ env.BUILD_VERSION }}