chore: Adjust reactive upgrade

doc/articles/migrating-from-previous-releases.md

@@ -8,10 +8,17 @@ This article details the migration steps required to migrate from one version to
 
 ## Uno Platform 5.4
 
-Uno Platform 5.4 contains one breaking change. The [`Uno.Extensions`](https://aka.platform.uno/uno-extensions) compatibility with legacy UWP apps has been removed. If your app is UWP-based and uses Uno.Extensions, in order to migrate to Uno Platform 5.4, you can keep using [previous releases of Uno.Extensions](https://github.com/unoplatform/uno.extensions/releases), or [migrate your app to WinUI](https://platform.uno/docs/articles/updating-to-winui3.html).
+Uno Platform 5.4 contains breaking changes for Uno.Extensions.
+
+### UWP Support for Uno.Extensions
+The [`Uno.Extensions`](https://aka.platform.uno/uno-extensions) compatibility with legacy UWP apps has been removed. If your app is UWP-based and uses Uno.Extensions, in order to migrate to Uno Platform 5.4, you can keep using [previous releases of Uno.Extensions](https://github.com/unoplatform/uno.extensions/releases), or [migrate your app to WinUI](https://platform.uno/docs/articles/updating-to-winui3.html).
 
 All the other features of Uno Platform 5.4 continue to be compatible with both UWP and WinUI apps.
 
+### Updates in Uno.Extensions.Reactive
+
+The generated code has changed, make sure to [review our docs to upgrade](xuid:Extensions.Migration.Reactive) to Uno Platform 5.4.
+
 ## Uno Platform 5.3
 
 Uno Platform 5.3 contains an improved template and Uno.SDK versioning, new default text font, and Rider support.