Merge pull request #2322 from skyace65/multimesh_update

update multimesh tutorial

tutorials/3d/using_multi_mesh_instance.rst

@@ -31,8 +31,8 @@ on. In the tree example, this would be the landscape.
 The other node is used as the source, the mesh that you want to have duplicated.
 In the tree case, this would be the tree itself.
 
-In our example, we would use a :ref:`Node <class_Node>` as the root node of the
-scene. Your scene tree would look like this:
+In our example, we would use a :ref:`Spatial <class_Spatial>` node as the root node of
+the scene. Your scene tree would look like this:
 
 .. image:: img/multimesh_scene_tree.png