Update README.MD fix Scala Build status (#677)

Update README.MD fix Scala Build status

Author: lemastero

README.MD

@@ -1,4 +1,4 @@
-[![Scala CI](https://github.com/lemastero/scala_typeclassopedia/workflows/Scala%20CI/badge.svg?branch=master)](https://github.com/lemastero/scala_typeclassopedia/actions?query=branch%3Amain)
+[![Scala CI](https://github.com/lemastero/scala_typeclassopedia/actions/workflows/scala.yml/badge.svg?branch=main)](https://github.com/lemastero/scala_typeclassopedia/actions/workflows/scala.yml?query=branch%3Amain)
 [![Scala Steward badge](https://img.shields.io/badge/Scala_Steward-helping-brightgreen.svg?style=flat&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAQCAMAAAARSr4IAAAAVFBMVEUAAACHjojlOy5NWlrKzcYRKjGFjIbp293YycuLa3pYY2LSqql4f3pCUFTgSjNodYRmcXUsPD/NTTbjRS+2jomhgnzNc223cGvZS0HaSD0XLjbaSjElhIr+AAAAAXRSTlMAQObYZgAAAHlJREFUCNdNyosOwyAIhWHAQS1Vt7a77/3fcxxdmv0xwmckutAR1nkm4ggbyEcg/wWmlGLDAA3oL50xi6fk5ffZ3E2E3QfZDCcCN2YtbEWZt+Drc6u6rlqv7Uk0LdKqqr5rk2UCRXOk0vmQKGfc94nOJyQjouF9H/wCc9gECEYfONoAAAAASUVORK5CYII=)](https://scala-steward.org)
 
 # Scala typeclassopedia