Update Material.html

Fixed a typo.

docs/api/materials/Material.html

@@ -236,7 +236,7 @@
 		<h3>[page:EventDispatcher EventDispatcher] methods are available on this class.</h3>
 
 		<h3>[method:Material clone]( )</h3>
-		<div>Return a new materials with the same parameters as this material.</div>
+		<div>Return a new material with the same parameters as this material.</div>
 
 		<h3>[method:Material copy]( [page:material material] )</h3>
 		<div>Copy the parameters from the passed material into this material.</div>