update build badge

Author: invalidusrname

README.md

@@ -1,6 +1,6 @@
 ![Impressionist Logo](https://github.com/charlotte-ruby/impressionist/raw/master/logo.png)
 
-[![Build Status](https://secure.travis-ci.org/charlotte-ruby/impressionist.png?branch=master)](http://travis-ci.org/charlotte-ruby/impressionist)
+[![Main](https://github.com/charlotte-ruby/impressionist/actions/workflows/main.yml/badge.svg)](https://github.com/charlotte-ruby/impressionist/actions/workflows/main.yml)
 [![Code Climate](https://codeclimate.com/github/charlotte-ruby/impressionist.png)](https://codeclimate.com/github/charlotte-ruby/impressionist)
 
 WE ARE LOOKING FOR MAINTAINERS.  CONTACT @johnmcaliley IF YOU ARE INTERESTED IN HELPING