Fix user classes

app/views/admin/users/_list.html.erb

 <div class="row g-3">
   <% users.each do |user| %>
-    <div class="col-6 col-lg-3 col-xxl-2">
-      <div class="card mb-0">
+    <div class="col-sm-6 col-lg-3 col-xxl-2">
+      <div class="<%= osuny_card_classes %>">
         <%= render 'admin/application/components/thumbnail',
                     image: user.picture,
                     initials: user.initials,
@@ -12,7 +12,7 @@
           <p class="mb-1">
             <%= link_to user,
                         admin_user_path(user),
-                        classes: 'stretched-link'  %>
+                        class: 'stretched-link'  %>
           </p>
           <p class="small text-muted mb-0">
             <%= t("activerecord.attributes.user.roles.#{user.role}") %>