Fix enable group roles label

Author: halfbyte-bevuta

app/views/settings/_oauth_settings.html.erb

@@ -143,7 +143,7 @@
       <em class="info"><%= l(:oauth_validate_user_roles_info) %></em>
     </p>
     <p>
-      <label><%= l(:oauth_oauth_enable_group_roles) %></label>
+      <label><%= l(:oauth_enable_group_roles) %></label>
       <%= check_box_tag 'settings[enable_group_roles]', '1', RedmineOauth.enable_group_roles? %>
       <em class="info">
         <%= l(:oauth_enable_group_roles_info) %><br>