fixing filename ommision. (#9621)
fixing filename ommision. (#9621)

{{ metadata_backup_file }} is missing when the page renders.
docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io