[README.md] Fix coverage link.

README.md

@@ -3,7 +3,7 @@ sot-core
 
 [![License](https://img.shields.io/badge/License-BSD%202--Clause-green.svg)](https://opensource.org/licenses/BSD-2-Clause)
 [![Pipeline status](https://gepgitlab.laas.fr/stack-of-tasks/sot-core/badges/master/pipeline.svg)](https://gepgitlab.laas.fr/stack-of-tasks/sot-core/commits/master)
-[![Coverage report](https://gepgitlab.laas.fr/stack-of-tasks/sot-core/badges/master/coverage.svg?job=doc-coverage)](http://projects.laas.fr/stack-of-tasks/doc/stack-of-tasks/sot-core/master/coverage/)
+[![Coverage report](https://gepgitlab.laas.fr/stack-of-tasks/sot-core/badges/master/coverage.svg?job=doc-coverage)](http://gepettoweb.laas.fr/doc/stack-of-tasks/sot-core/master/coverage/)
 
 This software provides a set of dynamic graph plug-ins which can be
 used to define and solve hierarchical tasks.