scale down settings titles on mobile

app/views/storage_settings/index.html.erb

@@ -1,7 +1,7 @@
 <div class="flex flex-wrap space-y-4 md:flex-nowrap md:space-y-0">
   <%= render 'shared/settings_nav' %>
   <div class="flex-grow md:max-w-xl md:mx-auto">
-    <h1 class="text-4xl font-bold mb-4">
+    <h1 class="text-3xl md:text-4xl font-bold mb-4">
       <%= t('storage') %>
     </h1>
     <% value = @encrypted_config.value || { 'service' => 'disk' } %>