Update App Deprecation Documentation to point to new app. (#4889)

* Update App Deprecation Documentation to point to new app.

* Update moving projects steps to also refer to the new app

Author: thsparks

docs/windows-app.md

@@ -1,11 +1,11 @@
 # Windows App Deprecation
 
-The Windows app is being deprecated by June 2022. Please use your web browser to access the website at https://makecode.microbit.org
+The original MakeCode for micro:bit Windows app has been deprecated. For continued support, please use our new app: https://apps.microsoft.com/store/detail/microsoft-makecode-for-microbit/9NMQDQ2XZKWK
 
 ## Moving Projects
 
-If you want to keep the projects you saved with the app and use them again in the MakeCode editor on the web, you will need to transfer them.
+If you want to keep the projects you saved with the old app and use them again in the new app, you will need to transfer them.
 
 1. Share the project from the app using the **Share** option.
 2. Copy the shared project URL that the app gives you.
-3. On the MakeCode website homepage, click on **Import** to open the shared project with the URL you just copied.
+3. On the new MakeCode app homepage, click on **Import** to open the shared project with the URL you just copied.