This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kubectl:1.28
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kubectl:1.28.15
  docker pull registry.opensuse.org/devel/bci/sle-15-sp7/containerfile/suse/kubectl:1.28.15-7.7

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.