Add CI status badge (#336)

This should help with noticing failed CI builds

README.md

@@ -1,5 +1,7 @@
 # ResetPasswordBundle: Mind-Blowing (and Secure) Password Resetting for Symfony
 
+[![CI](https://github.com/SymfonyCasts/reset-password-bundle/actions/workflows/ci.yaml/badge.svg)](https://github.com/SymfonyCasts/reset-password-bundle/actions/workflows/ci.yaml)
+
 Worrying about how to deal with users that can't remember their password? We've 
 got you covered! This bundle provides a secure out of the box solution to allow 
 users to reset their forgotten passwords.