Change Azure pipeline badge to GH actions (apache#5081)

README.md

@@ -23,7 +23,7 @@
 [Release Notes](NEWS.md)
 
 [![Build Status](https://ci.tvm.ai/buildStatus/icon?job=tvm/master)](https://ci.tvm.ai/job/tvm/job/master/)
-[![Azure Pipeline](https://dev.azure.com/tvmai/tvm/_apis/build/status/windows_mac_build?branchName=master)](https://dev.azure.com/tvmai/tvm/_build/latest?definitionId=2&branchName=master)
+[![WinMacBuild](https://github.com/apache/incubator-tvm/workflows/WinMacBuild/badge.svg)](https://github.com/apache/incubator-tvm/actions?query=workflow%3AWinMacBuild)
 
 Apache TVM (incubating) is a compiler stack for deep learning systems. It is designed to close the gap between the
 productivity-focused deep learning frameworks, and the performance- and efficiency-focused hardware backends.