remove webgl mention

docs/api/materials/Material.html

@@ -162,7 +162,7 @@
 
 		<h3>[property:Boolean needsUpdate]</h3>
 		<p>
-		Specifies that the material needs to be updated at the WebGL level.
+		Specifies that the material needs to be recompiled.
 		Set it to true if you want the shader to be recompiled.<br />
 		This property is automatically set to *true* when instancing a new material.
 		</p>