Update build status badge

Author: Tobias Richter

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/wcm-io-devops/jenkins-pipeline-library.svg?branch=master)](https://travis-ci.org/wcm-io-devops/jenkins-pipeline-library)
+[![Build Status](https://travis-ci.com/wcm-io-devops/jenkins-pipeline-library.svg?branch=master)](https://travis-ci.com/wcm-io-devops/jenkins-pipeline-library)
 [![Code Coverage](https://codecov.io/gh/wcm-io-devops/jenkins-pipeline-library/branch/master/graph/badge.svg)](https://codecov.io/gh/wcm-io-devops/jenkins-pipeline-library)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.wcm.devops.jenkins/io.wcm.devops.jenkins.pipeline-library/badge.svg)](https://maven-badges.herokuapp.com/maven-central/io.wcm.devops.jenkins/io.wcm.devops.jenkins.pipeline-library)
 [![Sonatype Snapshots](https://img.shields.io/nexus/s/https/oss.sonatype.org/io.wcm.devops.jenkins/io.wcm.devops.jenkins.pipeline-library.svg)](https://oss.sonatype.org/content/repositories/snapshots/io/wcm/devops/jenkins/io.wcm.devops.jenkins.pipeline-library/)