More appropriate settings landmarks

app/javascript/styles/mastodon/admin.scss

@@ -411,7 +411,7 @@ $content-width: 840px;
         display: flex;
       }
 
-      & > ul {
+      & > nav > ul {
         display: none;
 
         &.visible {

app/views/layouts/admin.html.haml

@@ -8,7 +8,7 @@
 - content_for :content do
   %a.navigation-skip-link{ href: '#content' }= t('admin.skip_to_content')
   .admin-wrapper
-    %nav.sidebar-wrapper
+    %header.sidebar-wrapper
       .sidebar-wrapper__inner
         .sidebar
           = link_to root_path do
@@ -23,7 +23,8 @@
               = material_symbol 'menu'
               = material_symbol 'close'
 
-          = render_navigation
+          %nav
+            = render_navigation
 
     %main.content-wrapper#content
       .content