Add health score badge to README (#56875)

Congrats! We have onboarded Laravel Framework to LFX Insights, the Linux Foundation's platform for monitoring the world's most critical open-source projects.

https://insights.linuxfoundation.org/project/laravel-framework

Author: jonathimer

README.md

@@ -5,6 +5,7 @@
 <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/dt/laravel/framework" alt="Total Downloads"></a>
 <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/v/laravel/framework" alt="Latest Stable Version"></a>
 <a href="https://packagist.org/packages/laravel/framework"><img src="https://img.shields.io/packagist/l/laravel/framework" alt="License"></a>
+<a href="https://insights.linuxfoundation.org/project/laravel-framework"><img src="https://insights.linuxfoundation.org/api/badge/health-score?project=laravel-framework" alt="Health score"></a>
 </p>
 
 ## About Laravel