Fix comment

src/Cameras/arcRotateCamera.ts

@@ -56,6 +56,7 @@ export class ArcRotateCamera extends TargetCamera {
     /**
      * Defines the target point of the camera.
      * The camera looks towards it form the radius distance.
+     * Please note that you can set the target to a mesh and thus the target will be copied from mesh.position
      */
     public get target(): Vector3 {
         return this._target;