message: [Docs] Add timestamp
diff: @@ -133,7 +133,7 @@ html_extra_path = ['.htaccess']
  # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
  # using the given strftime format.
  -#html_last_updated_fmt = '%b %d, %Y'
  +html_last_updated_fmt = '%b %d, %Y'
  # If true, SmartyPants will be used to convert quotes and dashes to
  # typographically correct entities.
  