Update README.md

Author: MerrickZ

README.md

@@ -3,7 +3,7 @@ rmdup
 
 Remove Duplicated Files in a *really fast* way.
 
-[![.NET](https://github.com/anpho/rmdup/actions/workflows/dotnet.yml/badge.svg)](https://github.com/anpho/rmdup/actions/workflows/dotnet.yml)
+[![build and release](https://github.com/anpho/rmdup/actions/workflows/release.yml/badge.svg)](https://github.com/anpho/rmdup/actions/workflows/release.yml)
 
 ## How to use