docs: update contribution guidelines (#6028)

CONTRIBUTING.md

@@ -4,10 +4,10 @@ Great to have you here! Here are a few ways you can help make this project bette
 
 ## Setting up a development environment
 
-Refer to [React Native environment setup](https://reactnative.dev/docs/environment-setup) to make sure everything is up and running.
-Follow the `React Native CLI Quickstart` section as we don't support Expo managed flow.
+Refer to [React Native environment setup](https://reactnative.dev/docs/set-up-your-environment) to make sure everything is up and running.
 
 *Note: you'll need a MacOS to run iOS apps*
+*Note: We don't support Expo managed flow*
 
 ### How to run
 
@@ -103,8 +103,6 @@ We use [Detox](https://github.com/wix/Detox) framework to end-to-end test our ap
 
 As soon as your changes are ready, you can open a Pull Request.
 
-The title of your PR should be descriptive, including either [NEW], [IMPROVEMENT] or [FIX] at the beginning, e.g. [FIX] App crashing on startup.
+Refer to [Pull request's tags](https://developer.rocket.chat/docs/pull-requests-tags) to write a good PR title.
 
-You may share working results prior to finishing, please include [WIP] in the title. This way anyone can look at your code: you can ask for help within the PR if you don't know how to solve a problem.
-
-Your PR is automatically inspected by various tools, check their response and try to improve your code accordingly. Requests that fail to build or have wrong coding style won't be merged.
+Open your PR as draft before asking for review. Your PR is automatically inspected by various tools, check their response and try to improve your code accordingly. Requests that fail to build or have wrong coding style won't be merged.