Update Ray.html

fixed broken link

docs/api/math/Ray.html

@@ -12,7 +12,7 @@
 
 		<div class="desc">
 			A ray that emits from an origin in a certain direction. This is used by the
-			[page:RayCaster] to assist with [link:https://en.wikipedia.org/wiki/Ray_casting raycasting].
+			[page:Raycaster] to assist with [link:https://en.wikipedia.org/wiki/Ray_casting raycasting].
 			Raycasting is used for mouse picking (working out what objects in the 3D space the mouse is over) amongst
 			other things.
 		</div>