fix: Link to the latest version in README

Author: jakubjanecek

README.md

@@ -1,7 +1,7 @@
 # Scala Server Toolkit
 
 ![Build Status](https://github.com/avast/scala-server-toolkit/workflows/Build/badge.svg)
-[![Maven Central](https://img.shields.io/maven-central/v/com.avast/sst-bundle-zio-http4s-blaze_2.13)](https://repo1.maven.org/maven2/com/avast/sst-bundle-zio-http4s-blaze_2.12/)
+[![Maven Central](https://img.shields.io/maven-central/v/com.avast/sst-bundle-zio-http4s-blaze_2.13)](https://repo1.maven.org/maven2/com/avast/sst-bundle-zio-http4s-blaze_2.13/)
 [![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)
 [![Mergify badge](https://img.shields.io/endpoint.svg?url=https://gh.mergify.io/badges/avast/scala-server-toolkit)](https://mergify.io)