Update README.md

Author: Nielsvanpach

README.md

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 # Manage newsletters in Laravel
 [![Latest Version](https://img.shields.io/github/release/spatie/laravel-newsletter.svg?style=flat-square)](https://github.com/spatie/laravel-newsletter/releases)
 [![MIT Licensed](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
-![GitHub Workflow Status](https://img.shields.io/github/workflow/status/spatie/laravel-newsletter/run-tests?label=tests)
-![Check & fix styling](https://github.com/spatie/laravel-newsletter/workflows/Check%20&%20fix%20styling/badge.svg)
+[![run-tests](https://github.com/spatie/laravel-newsletter/actions/workflows/run-tests.yml/badge.svg)](https://github.com/spatie/laravel-newsletter/actions/workflows/run-tests.yml)
+[![PHPStan](https://github.com/spatie/laravel-newsletter/actions/workflows/phpstan.yml/badge.svg)](https://github.com/spatie/laravel-newsletter/actions/workflows/phpstan.yml)
 [![Total Downloads](https://img.shields.io/packagist/dt/spatie/laravel-newsletter.svg?style=flat-square)](https://packagist.org/packages/spatie/laravel-newsletter)
 
 This package provides an easy way to integrate subscriptions to email lists of various email services.