Update 4 files

• /templates/block/block--system-menu-block--footer.html.twig
• /templates/block/block--system-menu-block.html.twig
• /templates/block/block--system-menu-block--utility-menu.html.twig
• /templates/block/block--system-menu-block--main.html.twig

templates/block/block--system-menu-block--footer.html.twig

-{#
-/**
- * @file
- * Theme override for a menu block.
- *
- * Available variables:
- * - plugin_id: The ID of the block implementation.
- * - label: The configured label of the block if visible.
- * - configuration: A list of the block's configuration values.
- *   - label: The configured label for the block.
- *   - label_display: The display settings for the label.
- *   - provider: The module or other provider that provided this block plugin.
- *   - Block plugin specific settings will also be stored here.
- * - in_preview: Whether the plugin is being rendered in preview mode.
- * - content: The content of this block.
- * - attributes: HTML attributes for the containing element.
- *   - id: A valid HTML ID and guaranteed unique.
- * - title_attributes: HTML attributes for the title element.
- * - content_attributes: HTML attributes for the content element.
- * - title_prefix: Additional output populated by modules, intended to be
- *   displayed in front of the main title tag that appears in the template.
- * - title_suffix: Additional output populated by modules, intended to be
- *   displayed after the main title tag that appears in the template.
- *
- * Headings should be used on navigation menus that consistently appear on
- * multiple pages. When this menu block's label is configured to not be
- * displayed, it is automatically made invisible using the 'visually-hidden' CSS
- * class, which still keeps it visible for screen-readers and assistive
- * technology. Headings allow screen-reader and keyboard only users to navigate
- * to or skip the links.
- * See http://juicystudio.com/article/screen-readers-display-none.php and
- * http://www.w3.org/TR/WCAG-TECHS/H42.html for more information.
- */
-#}
-{% set heading_id = attributes.id ~ '-menu'|clean_id %}
-<nav role="navigation" aria-label={{"Footer"|t|striptags}} {{ attributes|without('role', 'aria-labelledby') }}>
-	{{ title_prefix }}
-	{{ title_suffix }}
-	{# Menu. #}
-	{% block content %}
-		{{ content }}
-	{% endblock %}
-</nav>