Update README.md

Author: lukeshingles

README.md

@@ -4,7 +4,7 @@ extinction
 *Fast interstellar dust extinction laws in Python*
 
 
-![Build Status](https://github.com/kbarbary/extinction/workflows/Python%20package/badge.svg)
+![Build Status](https://github.com/kbarbary/extinction/workflows/Test/badge.svg)
 [![PyPI](https://img.shields.io/pypi/v/extinction.svg?style=flat-square)](https://pypi.python.org/pypi/extinction)
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.804967.svg)](https://doi.org/10.5281/zenodo.804967)