Update scenes_and_nodes.rst (#1939)

(cherry picked from commit 26409dda76a503e84bbf800e494164a789abcfa5)

getting_started/step_by_step/scenes_and_nodes.rst

@@ -36,7 +36,7 @@ functions. However, any given node always has the following attributes:
 -  It has editable properties.
 -  It can receive a callback to process every frame.
 -  It can be extended (to have more functions).
--  It can be added to other nodes as a child.
+-  It can be added to another node as a child.
 
 .. image:: img/tree.png