Update badge for Maven Central (#192)

Author: grouzen

README.md

@@ -2,8 +2,7 @@
 
 
 ![Build status](https://github.com/grouzen/zio-apache-arrow/actions/workflows/ci.yml/badge.svg)
-![Sonatype Nexus (Releases)](https://img.shields.io/nexus/r/me.mnedokushev/zio-apache-arrow-core_2.12?server=https%3A%2F%2Foss.sonatype.org)
-![Sonatype Nexus (Snapshots)](https://img.shields.io/nexus/s/me.mnedokushev/zio-apache-arrow-core_2.13?server=https%3A%2F%2Foss.sonatype.org)
+![Maven Central](https://img.shields.io/maven-central/v/me.mnedokushev/zio-apache-arrow-core_2.13.svg?label=Maven%20central)
 [![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)
 
 # ZIO Apache Arrow