Remove duplicate owner in image name

Signed-off-by: Roman Schwarz <rs@cloudeteer.de>

Author: rswrz

.github/workflows/build-and-push.yaml

@@ -33,7 +33,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v4
         with:
-          images: ghcr.io/${{ github.repository_owner }}/${{ github.repository }}
+          images: ghcr.io/${{ github.repository }}
           flavor: |
             latest=true
           tags: |