Update BufferAttribute.html

docs/api/en/core/BufferAttribute.html

@@ -158,7 +158,7 @@
 		<h3>[method:Number getW]( [param:Integer index] ) </h3>
 		<p>Returns the w component of the vector at the given index.</p>
 
-		<h3>[method:null onUpload]( [param:Function callback] ) </h3>
+		<h3>[method:this onUpload]( [param:Function callback] ) </h3>
 		<p>
 		Sets the value of the onUploadCallback property.<br /><br />