added build badge

Author: AWS Scripting Guy

README.md

@@ -1,5 +1,6 @@
 CloudFormation support for Visual Studio Code 
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+[![Build Status](https://dev.azure.com/aws-scripting-guy/cform-VSCode/_apis/build/status/cform-VSCode-CI?branchName=master)](https://dev.azure.com/aws-scripting-guy/cform-VSCode/_build/latest?definitionId=6&branchName=master)
 
 This is a fork of [ST3 CloudFormation plugin](https://github.com/beaknit/cform).