updates per testing in staging

Author: chriskim2311

src/site/navigation/sidebar_nav.drupal.liquid

@@ -1,5 +1,5 @@
 <nav data-template="navigation/sidebar_nav" aria-label="Secondary" id="va-detailpage-sidebar" data-drupal-sidebar="true" class="va-drupal-sidebarnav usa-width-one-fourth va-sidebarnav">
-<div aria-modal="true" role="dialog" aria-labelledby="sidebar_header">
+<dialog aria-modal="true" aria-labelledby="sidebar_header">
         <button class="va-sidenav-btn-close va-sidebarnav-close" type="button" aria-label="Close this menu">
             <va-icon icon="close" size="3" class="vads-u-color--gray-dark"></va-icon>
         </button>
@@ -115,5 +115,5 @@
 
         {% endfor %}
 
-    </div>
+    </dialog>
 </nav>