update deployment section
update deployment section

NOTE:
  pick up from https://github.com/vuejs/vuejs.org/commit/0a4e6539c4b648a2a377fa1d9af48fd3bd19e886

potato4d/jp.vuejs.org,vuejs/jp.vuejs.org,vuejs/jp.vuejs.org,potato4d/jp.vuejs.org