Updated badges

Author: snoyberg

README.md

@@ -1,6 +1,7 @@
 ## The Haskell Tool Stack
 
-[![Build Status](https://dev.azure.com/commercialhaskell/stack/_apis/build/status/commercialhaskell.stack?branchName=master)](https://dev.azure.com/commercialhaskell/stack/_build/latest?definitionId=1?branchName=master)
+![Unit tests](https://github.com/commercialhaskell/stack/workflows/Unit%20tests/badge.svg)
+![Integration tests](https://github.com/commercialhaskell/stack/workflows/Integration%20tests/badge.svg)
 [![Release](https://img.shields.io/github/release/commercialhaskell/stack.svg)](https://github.com/commercialhaskell/stack/releases)
 [![Join the chat at https://gitter.im/commercialhaskell/stack](https://badges.gitter.im/commercialhaskell/stack.svg)](https://gitter.im/commercialhaskell/stack?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)