Update README.md

Author: pwelter34

README.md

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 .NET Core command-line (CLI) tool to generate Entity Framework Core model from an existing database.
 
-[![Build status](https://ci.appveyor.com/api/projects/status/7ncldyr182jpu524?svg=true)](https://ci.appveyor.com/project/LoreSoft/entityframeworkcore-generator)
+[![Build Project](https://github.com/loresoft/EntityFrameworkCore.Generator/actions/workflows/dotnet.yml/badge.svg)](https://github.com/loresoft/EntityFrameworkCore.Generator/actions/workflows/dotnet.yml)
 
 [![NuGet Version](https://img.shields.io/nuget/v/EntityFrameworkCore.Generator.svg?style=flat-square)](https://www.nuget.org/packages/EntityFrameworkCore.Generator/)