Add notice for material bottom tabs docs

Author: satya164

versioned_docs/version-6.x/material-bottom-tab-navigator.md

@@ -4,6 +4,8 @@ title: Material Bottom Tabs Navigator
 sidebar_label: Material Bottom Tabs
 ---
 
+> The `material-bottom-tabs` navigator is moved to [`react-native-paper`](https://reactnativepaper.com/). Refer to [`react-native-paper`'s documentation](https://callstack.github.io/react-native-paper/docs/components/BottomNavigation/createMaterialBottomTabNavigator) for API and usage. For any issues with the navigator, please open an issue in [`react-native-paper`'s repository](https://github.com/callstack/react-native-paper/).
+
 A material-design themed tab bar on the bottom of the screen that lets you switch between different routes with animation. Routes are lazily initialized - their screen components are not mounted until they are first focused.
 
 This wraps the [`BottomNavigation`](https://callstack.github.io/react-native-paper/bottom-navigation.html) component from [`react-native-paper`](https://reactnativepaper.com). If you [configure the Babel plugin](https://callstack.github.io/react-native-paper/getting-started.html), it won't include the whole `react-native-paper` library in your bundle.