Fix maven badge in README

Author: mvitz

README.md

@@ -1,7 +1,7 @@
 # JUnit 5 logging extension
 *- Sometimes logging is important*
 
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.innoq/junit5-logging-extension/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.innoq/junit5-logging-extension)
+[![Maven Central](https://maven-badges.sml.io/maven-central/com.innoq/junit5-logging-extension/badge.svg)](https://maven-badges.sml.io/maven-central/com.innoq/junit5-logging-extension)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0)
 [![Open Issues](https://img.shields.io/github/issues/innoq/junit5-logging-extension.svg)](https://github.com/innoq/junit5-logging-extension/issues)
 [![Build Status](https://github.com/innoq/junit5-logging-extension/actions/workflows/main.yml/badge.svg)](https://github.com/innoq/junit5-logging-extension/actions/workflows/main.yml)