Fix Maven Badge

It would seem that maven badges site is offline

Author: SentryMan

README.md

@@ -1,5 +1,5 @@
 [![Discord](https://img.shields.io/discord/1074074312421683250?color=%237289da&label=discord)](https://discord.gg/Qcqf9R27BR)
-[![Maven Central : avaje-config](https://maven-badges.herokuapp.com/maven-central/io.avaje/avaje-config/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.avaje/avaje-config)
+[![Maven Central](https://img.shields.io/maven-central/v/io.avaje/avaje-config.svg?label=Maven%20Central)](https://mvnrepository.com/artifact/io.avaje/avaje-config)
 [![javadoc](https://javadoc.io/badge2/io.avaje/avaje-config/javadoc.svg?color=purple)](https://javadoc.io/doc/io.avaje/avaje-config/latest/io.avaje.config/io/avaje/config/package-summary.html)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/avaje/avaje-config/blob/master/LICENSE)
 [![Build](https://github.com/avaje/avaje-config/actions/workflows/build.yml/badge.svg)](https://github.com/avaje/avaje-config/actions/workflows/build.yml)