show.html.erb in spree_backend-4.8.1

- old
+ new

@@ -2,10 +2,10 @@
     <%= link_to Spree.t(:stock_transfers), spree.admin_stock_transfers_url %> /
     <%= @stock_transfer.number %>
 <% end %>
 
 <% content_for :page_actions do %>
-  <%= button_link_to Spree.t(:new_stock_transfer), new_admin_stock_transfer_path, { icon: 'add', class: 'btn-success' } %>
+  <%= button_link_to Spree.t(:new_stock_transfer), new_admin_stock_transfer_path, { icon: 'add', class: 'btn-primary' } %>
 <% end if can? :create, Spree::StockTransfer %>
 
 <fieldset>
   <legend><%= Spree.t(:stock_transfer_name) %></legend>
 <div class="table-responsive border rounded bg-white">