fixed minor bug

Author: Jonathan

HOL.md

@@ -1128,7 +1128,7 @@ Time-consuming operations on your web site are great candidates for asynchronous
 
 	The RegisterAsyncTask registers a new page asynchronous task to be executed in a different thread. It receives a lambda expression with the Task (t) to be executed. The **await** keyword in the **DownloadFileTaskAsync** method converts the remainder of the method into a callback that is invoked asynchronously after the **DownloadFileTaskAsync** method has completed. ASP.NET will resume the execution of the method by automatically maintaining all the HTTP request original values. The new asynchronous programming model in .NET 4.5 enables you to write asynchronous code that looks very much like synchronous code, and let the compiler handle the complications of callback functions or continuation code. **Note:** RegisterAsyncTask and PageAsyncTask were already available since .NET 2.0. The await keyword is new from the .NET 4.5 asynchronous programming model and can be used together with the new TaskAsync methods from the .NET WebClient object.
 
-1. Add code to display the threads on which the code started and finished executing. To do this, replace the **UpdateProductImage** method with the following code.
+1. Add code to display the threads on which the code started and finished executing. To do this, update the **UpdateProductImage** method with the following code.
 
 	(Code Snippet - _Web Forms Lab - Ex03 - Show threads_)