Remove en-us from link (#1902)

Author: gewarren

async/async-and-await/vb/readme.md

@@ -35,7 +35,7 @@ To download and run the sample, follow these steps:
 
     2. Navigate to the folder that holds the unzipped sample code, and open the Visual Basic project (*.vbproj*) file.
 
-    3. Choose the F5 key, or Ctrl+F5 keys, to run the project.
+    3. Choose the **F5** key, or **Ctrl**+**F5** keys, to run the project.
 
 3. From the command line:
 
@@ -45,4 +45,4 @@ To download and run the sample, follow these steps:
 
 ## More information
 
-- <https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/concepts/async/index>
+- <https://docs.microsoft.com/dotnet/visual-basic/programming-guide/concepts/async/index>