Update kubernetes.md related https://gitlab.com/gitlab-org/gitlab-ce/issues/64959#note_194582424
outdate document
if user follow it will cause docker sock error
see https://gitlab.com/gitlab-org/gitlab-ce/issues/64959#note_194582424
outdate document
if user follow it will cause docker sock error
see https://gitlab.com/gitlab-org/gitlab-ce/issues/64959#note_194582424