Sync classref with current source

classes/class_raycast2d.rst

@@ -79,6 +79,11 @@ Only enabled raycasts will be able to query the space and report collisions.
 
 RayCast2D calculates intersection every physics frame (see :ref:`Node<class_Node>`), and the result is cached so it can be used later until the next frame. If multiple queries are required between physics frames (or during the same frame) use :ref:`force_raycast_update<class_RayCast2D_method_force_raycast_update>` after adjusting the raycast.
 
+Tutorials
+---------
+
+- :doc:`../tutorials/physics/ray-casting`
+
 Property Descriptions
 ---------------------