Fix typo in instancing.rst

Quickfix for a typo on the "Creating instances" page

getting_started/step_by_step/instancing.rst

@@ -195,7 +195,7 @@ For example, you could break down a shooter game like so:
 
 You can come up with a diagram like this for almost any type of game. Each
 rectangle represents an entity that's visible in the game from the player's
-perspective. The arrows point towards the insantiator of each scene.
+perspective. The arrows point towards the instantiator of each scene.
 
 Once you have a diagram, we recommend creating a scene for each element listed
 in it to develop your game. You'll use instancing, either by code or directly in