docs: fix CI badge

README.md

@@ -8,7 +8,7 @@ It is especially useful to publish async and real-time updates of resources serv
 [![Awesome](https://awesome.re/badge.svg)](docs/ecosystem/awesome.md)
 [![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/mercure)](https://artifacthub.io/packages/search?repo=mercure)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/dunglas/mercure)](https://pkg.go.dev/github.com/dunglas/mercure)
-![CI](https://github.com/dunglas/mercure/workflows/CI/badge.svg)
+[![CI](https://github.com/dunglas/mercure/actions/workflows/ci.yml/badge.svg)](https://github.com/dunglas/mercure/actions/workflows/ci.yml)
 [![Coverage Status](https://coveralls.io/repos/github/dunglas/mercure/badge.svg?branch=master)](https://coveralls.io/github/dunglas/mercure?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/dunglas/mercure)](https://goreportcard.com/report/github.com/dunglas/mercure)