Docs: Add a @global entry for $wp_post_statuses in WP_Customize_Nav_Menus::make_auto_draft_status_previewable().

Props afzalmultani.
See #41238.

git-svn-id: https://develop.svn.wordpress.org/trunk@41004 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-customize-nav-menus.php

@@ -1141,6 +1141,8 @@ final class WP_Customize_Nav_Menus {
 	 *
 	 * @since 4.7.0
 	 * @access public
+	 *
+	 * @global array $wp_post_statuses List of post statuses.
 	 */
 	public function make_auto_draft_status_previewable() {
 		global $wp_post_statuses;