docs(README): fix contributing link, add installations (#5693)

Author: mikehardy

README.md

@@ -44,8 +44,8 @@ The main package that you interface with is `App` (`@react-native-firebase/app`)
 | -------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | 
 | [Analytics](/packages/analytics)                         |           [![badge](https://img.shields.io/npm/dm/@react-native-firebase/analytics.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/analytics)           |
 | [App](/packages/app)                                     |                 [![badge](https://img.shields.io/npm/dm/@react-native-firebase/app.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/app)                 |
-| [App Check](/packages/app-check)                          |                 [![badge](https://img.shields.io/npm/dm/@react-native-firebase/app-check.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/app-check)                 |
-| [App Distribution](/packages/app-distribution)            |                 [![badge](https://img.shields.io/npm/dm/@react-native-firebase/app-distribution.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/app-distribution)             |
+| [App Check](/packages/app-check)                         |               [![badge](https://img.shields.io/npm/dm/@react-native-firebase/app-check.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/app-check)       |
+| [App Distribution](/packages/app-distribution)           |  [![badge](https://img.shields.io/npm/dm/@react-native-firebase/app-distribution.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/app-distribution)      |
 | [Authentication](/packages/auth)                         |                [![badge](https://img.shields.io/npm/dm/@react-native-firebase/auth.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/auth)                |
 | [Cloud Firestore](/packages/firestore)                   |           [![badge](https://img.shields.io/npm/dm/@react-native-firebase/firestore.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/firestore)           |
 | [Cloud Functions](/packages/functions)                   |           [![badge](https://img.shields.io/npm/dm/@react-native-firebase/functions.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/functions)           |
@@ -54,6 +54,7 @@ The main package that you interface with is `App` (`@react-native-firebase/app`)
 | [Crashlytics](/packages/crashlytics)                     |         [![badge](https://img.shields.io/npm/dm/@react-native-firebase/crashlytics.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/crashlytics)         |
 | [Dynamic Links](/packages/dynamic-links)                 |       [![badge](https://img.shields.io/npm/dm/@react-native-firebase/dynamic-links.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/dynamic-links)       |
 | [In-app Messaging](/packages/in-app-messaging)           |    [![badge](https://img.shields.io/npm/dm/@react-native-firebase/in-app-messaging.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/in-app-messaging)    |
+| [Installations](/packages/installations)                 |    [![badge](https://img.shields.io/npm/dm/@react-native-firebase/installations.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/installations)          |
 | [ML](/packages/ml)                                       |           [![badge](https://img.shields.io/npm/dm/@react-native-firebase/ml.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/ml)                         |
 | [Performance Monitoring](/packages/perf)                 |                [![badge](https://img.shields.io/npm/dm/@react-native-firebase/perf.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/perf)                |
 | [Realtime Database](/packages/database)                  |            [![badge](https://img.shields.io/npm/dm/@react-native-firebase/database.svg?style=for-the-badge&logo=npm)](https://www.npmjs.com/package/@react-native-firebase/database)            |
@@ -68,7 +69,7 @@ Looking for the Version 5 documentation? [View legacy documentation](https://v5.
 
 ## Contributing
 
-- [Overview](https://rnfirebase.io)
+- [Overview](https://github.com/invertase/react-native-firebase/blob/master/CONTRIBUTING.md)
 - [Issues](https://github.com/invertase/react-native-firebase/issues)
 - [PRs](https://github.com/invertase/react-native-firebase/pulls)
 - [Documentation](https://rnfirebase.io)