update RN en releasenotes

markdown/RTC 4.x/release-notes/en-US/framework/release_rn_ng.md

@@ -1,3 +1,11 @@
+## Known issues and limitations
+
+Due to changes in the screen sharing behavior of Android 14 system, using devices with this version for screen sharing may encounter the following issues:
+
+- Switching between landscape and portrait mode during screen sharing can interrupt the current screen sharing process and a window will pop up asking if you want to start recording the screen. Once confirmed, screen sharing can be restarted.
+
+- When integrating the SDK, setting the Android `targetSdkVersion` to 34 may cause the screen sharing feature to be unavailable or even cause the application to crash.
+
 ## v4.2.3
 
 v4.2.3 was released on September xx, 2023.