Update readme

Signed-off-by: Alberto Tudela <ajtudela@gmail.com>

README.md

@@ -3,7 +3,7 @@
 ![ROS2](https://img.shields.io/badge/ros2-humble-blue?logo=ros&logoColor=white)
 ![License](https://img.shields.io/github/license/grupo-avispa/scitos2)
 [![Build](https://github.com/grupo-avispa/scitos2/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/grupo-avispa/scitos2/actions/workflows/build.yml)
-[![codecov](https://codecov.io/gh/grupo-avispa/scitos2/graph/badge.svg)](https://codecov.io/gh/grupo-avispa/scitos2)
+[![codecov](https://codecov.io/gh/grupo-avispa/scitos2/graph/badge.svg?token=794XFYV0FK)](https://codecov.io/gh/grupo-avispa/scitos2)
 
 ## Overview