Update readme.md

Author: Tochemey

readme.md

@@ -6,7 +6,6 @@
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.superflat/lagompb-core_2.13/badge.svg)]((https://maven-badges.herokuapp.com/maven-central/io.superflat/lagompb-core_2.13))
 [![Snapshot Artifacts][Badge-SonatypeSnapshots]][Link-SonatypeSnapshots]
 [![Join the chat at https://gitter.im/super-flat/lagom-pb](https://badges.gitter.im/super-flat/lagom-pb.svg)](https://gitter.im/super-flat/lagom-pb?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![Scala Steward badge](https://img.shields.io/badge/Scala_Steward-helping-blue.svg?style=flat&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAQCAMAAAARSr4IAAAAVFBMVEUAAACHjojlOy5NWlrKzcYRKjGFjIbp293YycuLa3pYY2LSqql4f3pCUFTgSjNodYRmcXUsPD/NTTbjRS+2jomhgnzNc223cGvZS0HaSD0XLjbaSjElhIr+AAAAAXRSTlMAQObYZgAAAHlJREFUCNdNyosOwyAIhWHAQS1Vt7a77/3fcxxdmv0xwmckutAR1nkm4ggbyEcg/wWmlGLDAA3oL50xi6fk5ffZ3E2E3QfZDCcCN2YtbEWZt+Drc6u6rlqv7Uk0LdKqqr5rk2UCRXOk0vmQKGfc94nOJyQjouF9H/wCc9gECEYfONoAAAAASUVORK5CYII=)](https://scala-steward.org)
 
 Scala Developer velocity in [lagom](https://www.lagomframework.com/documentation/1.6.x/scala/Home.html) development using protocol buffer.