Add SonarCloud coverage badge

README.md

@@ -4,7 +4,7 @@ Plugin Framework for Java (PF4J)
 =====================
 [![Join the chat at https://gitter.im/decebals/pf4j](https://badges.gitter.im/decebals/pf4j.svg)](https://gitter.im/decebals/pf4j?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![GitHub Actions Status](https://github.com/pf4j/pf4j/actions/workflows/build.yml/badge.svg)](https://github.com/pf4j/pf4j/actions/workflows/build.yml)
-[![Coverage Status](https://coveralls.io/repos/pf4j/pf4j/badge.svg?branch=master&service=github)](https://coveralls.io/github/pf4j/pf4j?branch=master)
+[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=pf4j_pf4j&metric=coverage)](https://sonarcloud.io/summary/new_code?id=pf4j_pf4j)
 [![Maven Central](http://img.shields.io/maven-central/v/org.pf4j/pf4j.svg)](http://search.maven.org/#search|ga|1|pf4j)
 
 A plugin is a way for a third party to extend the functionality of an application. A plugin implements extension points