Update CubeGeometry.html

"contructor",a spelling mistake.

docs/api/extras/geometries/CubeGeometry.html

@@ -30,7 +30,7 @@
 		<h2>Properties</h2>
 		
 		<div>
-		Each of the contructor parameters is accessible as a property of the same name. Any modification of these properties after instantiation does not change the geometry.
+		Each of the constructor parameters is accessible as a property of the same name. Any modification of these properties after instantiation does not change the geometry.
 		</div>
 		
 		<h2>Source</h2>