fix another typo

app/views/learning_objects/show.html.erb

@@ -163,7 +163,7 @@
   </div>
 </div>
 
-<% if @learning_object.owner != current_user %>
+<% if @learning_object.publisher != current_user %>
   <%= link_to 'Avalie este objeto!', new_review_path(reviewable_id: @learning_object.id, reviewable_type: @learning_object.class.name), class: 'btn btn-success'  %>
 <% end -%>