fix: Navigation is in Alpha, not Experimental (JetBrains#294)

Author: zamulla

topics/compose/compose-navigation-routing.md

@@ -3,6 +3,12 @@
 Navigation is a key part of UI applications that allows users to move between different application screens.
 Compose Multiplatform adopts the [Jetpack Compose approach to navigation](https://developer.android.com/guide/navigation/design#frameworks).
 
+> The navigation library is currently in [Alpha](supported-platforms.md#core-kotlin-multiplatform-technology-stability-levels).
+> You're welcome to try it in your Compose Multiplatform projects. Remember to track potential migration issues in future releases.
+> We would appreciate your feedback in [YouTrack](https://youtrack.jetbrains.com/newIssue?project=CMP).
+>
+{style="warning"}
+
 ## Setup
 
 To use the navigation library, add the following dependency to your `commonMain` source set: