ci: change README badge

Author: dunglas

README.md

@@ -2,8 +2,7 @@
 
 **A browser testing and web scraping library for [PHP](https://php.net) and [Symfony](https://symfony.com)**
 
-[![Build Status](https://travis-ci.org/symfony/panther.svg?branch=master)](https://travis-ci.org/symfony/panther)
-[![Build status](https://ci.appveyor.com/api/projects/status/bunoc4ufud4oie45?svg=true)](https://ci.appveyor.com/project/fabpot/panther)
+![CI](https://github.com/symfony/panther/workflows/CI/badge.svg)
 [![SymfonyInsight](https://insight.symfony.com/projects/9ea7e78c-998a-4489-9815-7449ce8291ef/mini.png)](https://insight.symfony.com/projects/9ea7e78c-998a-4489-9815-7449ce8291ef)
 
 *Panther* is a convenient standalone library to scrape websites and to run end-to-end tests **using real browsers**.