fix ambigous wording

docs/api/materials/Material.html

@@ -163,7 +163,7 @@
 		<h3>[property:Boolean needsUpdate]</h3>
 		<p>
 		Specifies that the material needs to be updated at the WebGL level.
-		Set it to true if you made changes that need to be reflected in WebGL.<br />
+		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>