Update seccomp runtime/default to docker/default
Update seccomp runtime/default to docker/default

The docs are not in alignment with the code, so if the code below is
correct this commit should be merged.

https://github.com/kubernetes/kubernetes/blob/59caf07228231c7c78aae66f9c1ad60e2c42fc29/pkg/kubelet/dockertools/docker_manager.go#L1191

https://github.com/kubernetes/kubernetes/blob/59caf07228231c7c78aae66f9c1ad60e2c42fc29/pkg/api/validation/validation.go#L2123

kubernetes/community,kubernetes/community,bgrant0607/community,pwittrock/community,bgrant0607/community,pwittrock/community,kubernetes/community