Submit button on copy page should not say 'yes', because the form is not presented as an 'are you sure?' confirmation message

wagtail/wagtailadmin/templates/wagtailadmin/pages/copy.html

@@ -26,7 +26,7 @@
                 {% endif %}
             </ul>
 
-            <input type="submit" value="{% trans 'Yes, copy this page' %}">
+            <input type="submit" value="{% trans 'Copy this page' %}">
         </form>
     </div>
 {% endblock %}