Update README.md

Author: ThomasGorisse

README.md

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 Sceneform Maintained SDK for Android
 ====================================
+---
+### ⚠️ **This framework isn't updated anymore. Consider using [Sceneview](https://github.com/SceneView/sceneview-android) in your projects instead.**
+---
 
-⚠️ **This framework isn't updated anymore. If you'd like to contribute, consider using [Sceneview](https://github.com/SceneView/sceneview-android) in your projects**
-
-## Sceneform Maintained is an ARCore Android SDK with Google Filament as 3D engine. This is the continuation of the [Archived Sceneform](https://developers.google.com/sceneform/develop)
+### Sceneform Maintained is an ARCore Android SDK with Google Filament as 3D engine. This is the continuation of the [Archived Sceneform](https://developers.google.com/sceneform/develop)
 
 **Android Augmented Reality library: AR Model Viewer, Augmented Images, Augmented Faces, Video, Depth, Cloud Anchors, Instant Placement, Light Estimation and much more in Kotlin and Java**