There is one change to the sites/default/default.settings.php file in this release.
Добавлены строки:
/**
* The default list of directories that will be ignored by Drupal's file API.
*
* By default ignore node_modules and bower_components folders to avoid issues
* with common frontend tools and recursive scanning of directories looking for
* extensions.
*
* @see file_scan_directory()
*/
$conf['file_scan_ignore_directories'] = array(
'node_modules',
'bower_components',
);
Пошаговое описание обновления системы до новой версии смотрите в документации.