Update Mesh.html

Fixes #12810

docs/api/objects/Mesh.html

@@ -67,7 +67,7 @@
 
 		<h3>[property:Material material]</h3>
 		<div>
-			An instance of material derived from the [page:Material] base class, defining the
+			An instance of material derived from the [page:Material] base class or an array of materials, defining the
 			object's appearance. Default is a [page:MeshBasicMaterial] with a random colour.
 		</div>