update Maven Central badge

Author: stefan-zobel

README.md

@@ -1,5 +1,5 @@
 [![CodeQL](https://github.com/stefan-zobel/JAMU/actions/workflows/codeql.yml/badge.svg)](https://github.com/stefan-zobel/JAMU/actions/workflows/codeql.yml)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/net.sourceforge.streamsupport/jamu/badge.svg)](https://maven-badges.herokuapp.com/maven-central/net.sourceforge.streamsupport/jamu)
+[![Maven Central](https://img.shields.io/maven-central/v/net.sourceforge.streamsupport/jamu.svg)](http://mvnrepository.com/artifact/net.sourceforge.streamsupport/jamu)
 [![javadoc.io](https://javadoc.io/badge2/net.sourceforge.streamsupport/jamu/javadoc.svg)](https://javadoc.io/doc/net.sourceforge.streamsupport/jamu)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)