Update README.md

Author: asturio

README.md

@@ -4,7 +4,9 @@ OpenRTF is a Java library for creating and editing RTF (Rich Text Format) files
 
 OpenRTF is branched out of OpenPDF - https://github.com/LibrePDF/OpenPDF
 
- [![License (LGPL version 3.0)](https://img.shields.io/badge/license-GNU%20LGPL%20version%203.0-blue.svg?style=flat-square)](http://opensource.org/licenses/LGPL-3.0) [![License (MPL)](https://img.shields.io/badge/license-Mozilla%20Public%20License-yellow.svg?style=flat-square)](http://opensource.org/licenses/MPL-2.0)
+[![Java CI](https://github.com/LibrePDF/OpenRTF/actions/workflows/maven.yml/badge.svg)](https://github.com/LibrePDF/OpenRTF/actions/workflows/maven.yml)
+[![License (LGPL version 3.0)](https://img.shields.io/badge/license-GNU%20LGPL%20version%203.0-blue.svg?style=flat-square)](http://opensource.org/licenses/LGPL-3.0) 
+[![License (MPL)](https://img.shields.io/badge/license-Mozilla%20Public%20License-yellow.svg?style=flat-square)](http://opensource.org/licenses/MPL-2.0)
 
 
 ## Use OpenRTF as Maven dependency