unify breakpoint classes

app/views/shared/_navbar.html.erb

@@ -34,7 +34,7 @@
               <span class="mr-1"><%= t('settings') %></span>
             <% end %>
           </li>
-          <li class="max-md:hidden">
+          <li class="hidden md:flex">
             <%= link_to settings_profile_index_path, class: 'flex items-center' do %>
               <%= svg_icon('adjustments', class: 'w-5 h-5 flex-shrink-0 stroke-2') %>
               <span class="mr-1"><%= t('profile') %></span>