Update readme.source.md

Author: SimonCropp

readme.source.md

@@ -1,7 +1,7 @@
 # <img src="/src/icon.png" height="30px"> DiffEngine
 
 [![Discussions](https://img.shields.io/badge/Verify-Discussions-yellow?svg=true&label=)](https://github.com/orgs/VerifyTests/discussions)
-[![Build status](https://ci.appveyor.com/api/projects/status/b62ti1b998iy3njw/branch/main?svg=true)](https://ci.appveyor.com/project/SimonCropp/DiffEngine)
+[![Build status](https://https://img.shields.io/appveyor/build/SimonCropp/DiffEngine)](https://ci.appveyor.com/project/SimonCropp/DiffEngine)
 [![NuGet Status](https://img.shields.io/nuget/v/DiffEngine.svg?label=DiffEngine)](https://www.nuget.org/packages/DiffEngine/)
 [![NuGet Status](https://img.shields.io/nuget/v/DiffEngineTray.svg?label=DiffEngineTray)](https://www.nuget.org/packages/DiffEngineTray/)