remove circle ci in README

Author: joannecheng

README.md

@@ -1,7 +1,7 @@
 # lambdaisland/uri
 
 <!-- badges -->
-[![CircleCI](https://circleci.com/gh/lambdaisland/uri.svg?style=svg)](https://circleci.com/gh/lambdaisland/uri) [![cljdoc badge](https://cljdoc.org/badge/lambdaisland/uri)](https://cljdoc.org/d/lambdaisland/uri) [![Clojars Project](https://img.shields.io/clojars/v/lambdaisland/uri.svg)](https://clojars.org/lambdaisland/uri)
+[![GitHub Actions](https://github.com/lambdaisland/uri/actions/workflows/main.yml/badge.svg)](https://github.com/lambdaisland/uri/actions/workflows/main.yml) [![cljdoc badge](https://cljdoc.org/badge/lambdaisland/uri)](https://cljdoc.org/d/lambdaisland/uri) [![Clojars Project](https://img.shields.io/clojars/v/lambdaisland/uri.svg)](https://clojars.org/lambdaisland/uri)
 <!-- /badges -->
 
 A pure Clojure/ClojureScript URI library.