Update README.md

Author: gisma

README.md

@@ -2,7 +2,7 @@
 [![Travis-CI Build Status](https://travis-ci.org/gisma/link2GI.svg?branch=master)](https://travis-ci.org/gisma/link2GI)
 <a href="https://cran.r-project.org/web/checks/check_results_link2GI.html"><img border="0" src="http://www.r-pkg.org/badges/version/link2GI" alt="CRAN version"></a>
 ![](https://cranlogs.r-pkg.org/badges/grand-total/link2GI?color=green)
-![](https://cranlogs.r-pkg.org/badges/link2GI?color=green)
+[![GitHub last commit](https://img.shields.io/github/last-commit/google/skia.svg)](https://github.com/gisma/link2GI/)
 [![License](https://img.shields.io/badge/license-GPL%20%28%3E=%203%29-lightgrey.svg?style=flat)](http://www.gnu.org/licenses/gpl-3.0.html)
 
 # link2GI