Update Vector3.html

see https://github.com/mrdoob/three.js/commit/8ae267866c11afd994be17c51c295cdc707ae375#commitcomment-25843370

docs/api/math/Vector3.html

@@ -301,7 +301,7 @@ var d = a.distanceTo( b );
 		<div>Multiplies this vector by scalar [page:Float s].</div>
 
 		<h3>[method:Vector3 multiplyVectors]( [page:Vector3 a], [page:Vector3 b] )</h3>
-		<div>Sets this vector equal to [page:Vector3 a] * [page:Vector3 b].</div>
+		<div>Sets this vector equal to [page:Vector3 a] * [page:Vector3 b], component-wise.</div>
 
 		<h3>[method:Vector3 project]( [page:Camera camera] )</h3>
 		<div>