updated CI badge

README.md

@@ -1,6 +1,6 @@
 # pyrubberband
 [![PyPI](https://img.shields.io/pypi/v/pyrubberband.svg)](https://pypi.python.org/pypi/pyrubberband)
-[![Build Status](https://travis-ci.org/bmcfee/pyrubberband.svg)](https://travis-ci.org/bmcfee/pyrubberband)
+[![CI](https://github.com/bmcfee/pyrubberband/actions/workflows/ci.yml/badge.svg)](https://github.com/bmcfee/pyrubberband/actions/workflows/ci.yml)
 [![Coverage Status](https://coveralls.io/repos/bmcfee/pyrubberband/badge.svg?branch=testing&service=github)](https://coveralls.io/github/bmcfee/pyrubberband?branch=testing)
 [![GitHub license](https://img.shields.io/github/license/bmcfee/pyrubberband.svg)]()
 [![Documentation Status](https://readthedocs.org/projects/pyrubberband/badge/?version=latest)](http://pyrubberband.readthedocs.org/en/latest/?badge=latest)