Update README as new arch won't be supported (microsoft#2779)

* Update README as new arch won't be supported

* Update readme

Author: DordeDimitrijev

README.md

@@ -3,7 +3,9 @@
 #### [Sign up With App Center](https://appcenter.ms/signup?utm_source=CodePush&utm_medium=Azure) to use CodePush
 
 # React Native Module for CodePush
-
+> [!WARNING]
+> React Native CodePush won't support new Architecture. In order to use this plugin on React Native versions starting from 0.76 you will need to [opt out](https://reactnative.dev/blog/2024/10/23/the-new-architecture-is-here#opt-out) from new architecture.
+>
 *Note: This README is only relevant to the latest version of our plugin. If you are using an older version, please switch to the relevant tag on [our GitHub repo](https://github.com/microsoft/react-native-code-push) to view the docs for that particular version.*
 
 ![Switching tags](https://user-images.githubusercontent.com/42337914/57237511-0835de80-7030-11e9-88fa-64eb200478d0.png)