update build status label and remove outdated code coverage label (#1462

)

README.md

@@ -1,7 +1,6 @@
 # Go Stripe
 [![Go Reference](https://pkg.go.dev/badge/github.com/stripe/stripe-go)](https://pkg.go.dev/github.com/stripe/stripe-go)
-[![Build Status](https://travis-ci.org/stripe/stripe-go.svg?branch=master)](https://travis-ci.org/stripe/stripe-go)
-[![Coverage Status](https://coveralls.io/repos/github/stripe/stripe-go/badge.svg?branch=master)](https://coveralls.io/github/stripe/stripe-go?branch=master)
+[![Build Status](https://github.com/stripe/stripe-go/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/stripe/stripe-go/actions/workflows/ci.yml?query=branch%3Amaster)
 
 The official [Stripe][stripe] Go client library.