README improvement

Author: hboutemy

CONTRIBUTING.md

@@ -19,9 +19,9 @@ Contributing to [Apache Maven Shade Plugin](https://maven.apache.org/plugins/mav
 
 [![ASF Jira](https://img.shields.io/endpoint?url=https%3A%2F%2Fmaven.apache.org%2Fbadges%2Fasf_jira-MSHADE.json)][jira]
 [![Apache License, Version 2.0, January 2004](https://img.shields.io/github/license/apache/maven.svg?label=License)][license]
-[![Maven Central](https://img.shields.io/maven-central/v/org.apache.maven.plugins/maven-shade-plugin.svg?label=Maven%20Central)](https://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22org.apache.maven.plugins%22%20AND%20a%3A%22maven-shade-plugin%22)
-[![Jenkins Status](https://img.shields.io/jenkins/s/https/builds.apache.org/job/maven-box/job/maven-shade-plugin/job/master.svg?style=flat-square)][build]
-[![Jenkins tests](https://img.shields.io/jenkins/t/https/builds.apache.org/job/maven-box/job/maven-shade-plugin/job/master.svg?style=flat-square)][test-results]
+[![Maven Central](https://img.shields.io/maven-central/v/org.apache.maven.plugins/maven-shade-plugin.svg?label=Maven%20Central)](https://search.maven.org/artifact/org.apache.maven.plugins/maven-shade-plugin)
+[![Jenkins Status](https://img.shields.io/jenkins/s/https/builds.apache.org/job/maven-box/job/maven-shade-plugin/job/master.svg?)][build]
+[![Jenkins tests](https://img.shields.io/jenkins/t/https/builds.apache.org/job/maven-box/job/maven-shade-plugin/job/master.svg?)][test-results]
 
 
 You have found a bug or you have an idea for a cool new feature? Contributing