chore: Update Test badge on README

We use GH actions now

Author: tvdeyen

README.md

@@ -1,6 +1,6 @@
 # Solidus Auth Devise
 
-[![CircleCI](https://circleci.com/gh/solidusio/solidus_auth_devise.svg?style=shield)](https://circleci.com/gh/solidusio/solidus_auth_devise)
+[![Test](https://github.com/solidusio/solidus_auth_devise/actions/workflows/test.yml/badge.svg)](https://github.com/solidusio/solidus_auth_devise/actions/workflows/test.yml)
 [![codecov](https://codecov.io/gh/solidusio/solidus_auth_devise/branch/main/graph/badge.svg)](https://codecov.io/gh/solidusio/solidus_auth_devise)
 
 Provides authentication services for Solidus, using the Devise gem.