Updated readme with new build badges

README.md

@@ -2,8 +2,8 @@
 
 | Build server | Platform     | Build status |
 |--------------|--------------|--------------|
-| AppVeyor     | Windows      | [![Build status](https://ci.appveyor.com/api/projects/status/o421l5hvocnlbwsu?svg=true)](https://ci.appveyor.com/project/tidyui/piranha-core-templates) |
-| Travis       | Linux / OS X | [![Build status](https://travis-ci.org/PiranhaCMS/piranha.core.templates.svg?branch=master)](https://travis-ci.org/PiranhaCMS/piranha.core.templates) |
+| GitHub Actions         | Windows      | [![.NET Win](https://github.com/PiranhaCMS/piranha.core.templates/actions/workflows/dotnet_win.yml/badge.svg)](https://github.com/PiranhaCMS/piranha.core.templates/actions/workflows/dotnet_win.yml) |
+| GitHub Actions         | Linux        | [![.NET Linux](https://github.com/PiranhaCMS/piranha.core.templates/actions/workflows/dotnet_linux.yml/badge.svg)](https://github.com/PiranhaCMS/piranha.core.templates/actions/workflows/dotnet_linux.yml) |
 
 ## About
 
@@ -21,4 +21,4 @@ For more information see the [.NET Foundation Code of Conduct](http://www.dotnet
 
 ## .NET Foundation
 
-This project is supported by the [.NET Foundation](http://www.dotnetfoundation.org).
+This project is supported by the [.NET Foundation](http://www.dotnetfoundation.org).