Merge branch 'SciSharp:master' into master

Author: Oceania2018

README.md

@@ -5,7 +5,7 @@
 [![QQ群聊](https://img.shields.io/static/v1?label=QQ&message=群聊&color=brightgreen)](http://qm.qq.com/cgi-bin/qm/qr?_wv=1027&k=sN9VVMwbWjs5L0ATpizKKxOcZdEPMrp8&authKey=RLDw41bLTrEyEgZZi%2FzT4pYk%2BwmEFgFcrhs8ZbkiVY7a4JFckzJefaYNW6Lk4yPX&noverify=0&group_code=985366726)
 [![Apache 2.0](https://img.shields.io/hexpm/l/plug.svg)](https://raw.githubusercontent.com/Oceania2018/BotSharp/master/LICENSE) 
 [![NuGet](https://img.shields.io/nuget/dt/BotSharp.Core.svg)](https://www.nuget.org/packages/BotSharp.Core) 
-[![Build status](https://ci.appveyor.com/api/projects/status/qx2dx5ca5hjqodm5?svg=true)](https://ci.appveyor.com/project/Haiping-Chen/botsharp)
+[![build](https://github.com/SciSharp/BotSharp/actions/workflows/build.yml/badge.svg)](https://github.com/SciSharp/BotSharp/actions/workflows/build.yml)
 [![Documentation Status](https://readthedocs.org/projects/botsharp/badge/?version=latest)](https://botsharp.readthedocs.io/en/latest/?badge=latest)
 
 *"Conversation as a platform (CaaP) is the future, so it's perfect that we're already offering the whole toolkits to our .NET developers using the BotSharp AI BOT Platform Builder to build a CaaP. It opens up as much learning power as possible for your own robots and precisely control every step of the AI processing pipeline."*