fix(readme): add maven central badge

Author: EDGA6280

README.adoc

@@ -3,6 +3,7 @@
 image:https://badges.gitter.im/Join%20Chat.svg[link="https://gitter.im/bodiam/markdown-to-asciidoc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge"]
 image:https://github.com/bodiam/markdown-to-asciidoc/actions/workflows/maven.yml/badge.svg[Build Status]
 image:https://github.com/bodiam/markdown-to-asciidoc/actions/workflows/maven-publish.yml/badge.svg[Publish Status]
+image:https://maven-badges.herokuapp.com/maven-central/nl.jworks.markdown_to_asciidoc/markdown_to_asciidoc/badge.svg?style={style}[]
 
 A small, lightweight converter for Markdown to http://www.asciidoc.org[AsciiDoc] written in Java, and based on http://pegdown.org[Pegdown].