Update Material.html

update ex. link

docs/api/en/materials/Material.html

@@ -211,7 +211,7 @@
 		<h3>[property:Boolean premultipliedAlpha]</h3>
 		<p>
 		Whether to premultiply the alpha (transparency) value.
-		See [Example:webgl_materials_transparency WebGL / Materials / Transparency] for an example of the difference.
+		See [Example:webgl_materials_blending_custom WebGL / Materials / Blending / Custom] for an example of the difference.
 		Default is *false*.
 		</p>