chore: Add Bluesky badge to README (#53616)

Summary:
Add Bluesky badge to README.

## Changelog:

[INTERNAL][ADDED] Add Bluesky badge to README

Pull Request resolved: #53616

Test Plan:
The updated README has been checked out on the PR branch.

## Preview:

<img width="1880" height="746" alt="Screenshot 2025-09-05 at 13 00 34" src="https://github.com/user-attachments/assets/dc1dfa9c-9e08-449d-82b8-dcb92ae92268" />

Reviewed By: cipolleschi

Differential Revision: D81909921

Pulled By: cortinico

fbshipit-source-id: b5fa79f152f126944bc1c31c8fbb86889f0f25db

Author: Simek

README.md

@@ -17,10 +17,13 @@
     <img src="https://img.shields.io/npm/v/react-native?color=brightgreen&label=npm%20package" alt="Current npm package version." />
   </a>
   <a href="https://reactnative.dev/docs/contributing">
-    <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs welcome!" />
+    <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs are welcome!" />
   </a>
   <a href="https://twitter.com/intent/follow?screen_name=reactnative">
-    <img src="https://img.shields.io/twitter/follow/reactnative.svg?label=Follow%20@reactnative" alt="Follow @reactnative" />
+    <img src="https://img.shields.io/twitter/follow/reactnative.svg?label=Follow%20@reactnative" alt="Follow @reactnative on X" />
+  </a>
+  <a href="https://bsky.app/profile/reactnative.dev">
+    <img src="https://img.shields.io/badge/Bluesky-0285FF?logo=bluesky&logoColor=fff" alt="Follow @reactnative.dev on Bluesky" />
   </a>
 </p>