README.md in rack-graphql-2.7.0 vs README.md in rack-graphql-2.7.1

- old
+ new

@@ -1,6 +1,6 @@
 [![Gem Version](https://badge.fury.io/rb/rack-graphql.svg)](https://rubygems.org/gems/rack-graphql)
-[![Build Status](https://travis-ci.org/RenoFi/rack-graphql.svg?branch=master)](https://travis-ci.org/RenoFi/rack-graphql)
+[![Build Status](https://github.com/RenoFi/rack-graphql/actions/workflows/ci.yml/badge.svg)](https://github.com/RenoFi/rack-graphql/actions/workflows/ci.yml?query=branch%3Amain)
 
 # rack-graphql
 
 `rack-graphql` is designed to build ruby services with graphql api. It provides `/graphql` endpoint and can handle [subscriptions](https://graphql-ruby.org/guides#subscriptions-guides) and [multiplex](https://graphql-ruby.org/queries/multiplex.html).
 