Add missing comment in code

Assets/AnimationRiggingWorkshop/Constraints/CopyLocationStep0.cs

         {
             constrained = ReadWriteTransformHandle.Bind(animator, data.constrainedObject),
             source = ReadOnlyTransformHandle.Bind(animator, data.sourceObject)
+
+            // TODO : Update binder code to add our new toggles
         };
     }