Fix build badge

Author: kzu

readme.md

@@ -1,7 +1,10 @@
 ![Icon](https://raw.githubusercontent.com/devlooped/SmallSharp/main/assets/img/icon-32.png) SmallSharp
 ============
 
-[![Version](https://img.shields.io/nuget/v/SmallSharp.svg?color=royalblue)](https://www.nuget.org/packages/SmallSharp) [![Downloads](https://img.shields.io/nuget/dt/SmallSharp?color=darkmagenta)](https://www.nuget.org/packages/SmallSharp) [![License](https://img.shields.io/github/license/devlooped/SmallSharp.svg?color=blue)](https://github.com/devlooped/SmallSharp/blob/main/LICENSE) [![GH CI Status](https://github.com/devlooped/SmallSharp/workflows/build/badge.svg?branch=main)](https://github.com/devlooped/avatar/actions?query=branch%3Amain+workflow%3Abuild+) 
+[![Version](https://img.shields.io/nuget/v/SmallSharp.svg?color=royalblue)](https://www.nuget.org/packages/SmallSharp) 
+[![Downloads](https://img.shields.io/nuget/dt/SmallSharp?color=darkmagenta)](https://www.nuget.org/packages/SmallSharp) 
+[![License](https://img.shields.io/github/license/devlooped/SmallSharp.svg?color=blue)](https://github.com/devlooped/SmallSharp/blob/main/LICENSE) 
+[![build](https://github.com/devlooped/SmallSharp/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/devlooped/SmallSharp/actions/workflows/build.yml)
 
 <!-- #description -->
 Create, edit and run multiple C# top-level programs in the same project, respecting per-file `#:package`