Add coverage and license badges to README.md (#1473)

Author: bart-vmware

README.md

@@ -1,6 +1,10 @@
 # Steeltoe .NET Open Source Software
 
-[![Build Status](https://dev.azure.com/SteeltoeOSS/Steeltoe/_apis/build/status/Steeltoe.All?branchName=main)](https://dev.azure.com/SteeltoeOSS/Steeltoe/_build/latest?definitionId=4&branchName=main) [![NuGet Version](https://img.shields.io/nuget/v/Steeltoe.Common.svg?style=flat)](https://www.nuget.org/profiles/SteeltoeOSS) [![Stack Overflow](https://img.shields.io/badge/stack%20overflow-steeltoe-orange.svg)](http://stackoverflow.com/questions/tagged/steeltoe)
+[![Build Status](https://dev.azure.com/SteeltoeOSS/Steeltoe/_apis/build/status/Steeltoe.All?branchName=main)](https://dev.azure.com/SteeltoeOSS/Steeltoe/_build/latest?definitionId=4&branchName=main)
+ [![Coverage](https://img.shields.io/azure-devops/coverage/SteeltoeOSS/Steeltoe/4/main)](https://dev.azure.com/SteeltoeOSS/Steeltoe/_build/latest?definitionId=4&branchName=main)
+ [![NuGet Version](https://img.shields.io/nuget/v/Steeltoe.Common.svg?style=flat)](https://www.nuget.org/profiles/SteeltoeOSS)
+ [![GitHub License](https://img.shields.io/github/license/SteeltoeOSS/Steeltoe)](LICENSE)
+ [![Stack Overflow](https://img.shields.io/badge/stack%20overflow-steeltoe-orange.svg)](http://stackoverflow.com/questions/tagged/steeltoe)
 
 ## Why Steeltoe?