Update README.md

Author: Jim Crowley

README.md

@@ -47,7 +47,7 @@ This sample requires the following:
 2. Select **Add an app**.  
 3. Enter a name for the app, and select **Create application**. The registration page displays, listing the properties of your app.  
 4. Under **Platforms**, select **Add platform**.  
-5. Select **Mobile application**.  
+5. Select **Native Application**.  
 6. Copy both the Client Id (App Id) and Redirect URI values to the clipboard. You'll need to enter these values into the sample app. The app id is a unique identifier for your app. The redirect URI is a unique URI provided by Windows 10 for each application to ensure that messages sent to that URI are only sent to that application.   
 7. Select **Save**.