[8.x] Update the badges to use shields.io (laravel#34679)

Shields.io works a lot better than the old pugx.org.

README.md

@@ -2,9 +2,9 @@
 
 <p align="center">
 <a href="https://github.com/laravel/framework/actions"><img src="https://github.com/laravel/framework/workflows/tests/badge.svg" alt="Build Status"></a>
-<a href="https://packagist.org/packages/laravel/framework"><img src="https://poser.pugx.org/laravel/framework/d/total.svg" alt="Total Downloads"></a>
-<a href="https://packagist.org/packages/laravel/framework"><img src="https://poser.pugx.org/laravel/framework/v/stable.svg" alt="Latest Stable Version"></a>
-<a href="https://packagist.org/packages/laravel/framework"><img src="https://poser.pugx.org/laravel/framework/license.svg" alt="License"></a>
+<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>
 </p>
 
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