Fix CI badges (#8)

* add checkout step

* update URL

* mention humble

.github/workflows/ci-iron.yaml

@@ -11,6 +11,7 @@ jobs:
     container:
       image: ubuntu:jammy
     steps:
+      - uses: actions/checkout@v4
       - uses: ros-tooling/setup-ros@v0.7
         with:
           use-ros2-testing: true

.github/workflows/ci-rolling.yaml

@@ -11,6 +11,7 @@ jobs:
     container:
       image: ubuntu:jammy
     steps:
+      - uses: actions/checkout@v4
       - uses: ros-tooling/setup-ros@v0.7
         with:
           use-ros2-testing: true

README.md

@@ -3,9 +3,9 @@ Wrench estimation and calibration of F/T sensor for ROS2 applications.
 
 
 [![Licence](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
-[![CI](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci.yml/badge.svg)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci.yml)
-[![Build tests (iron)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci-iron.yml/badge.svg?branch=main)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci-iron.yml?query=branch:main)
-[![Build tests (rolling)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci-rolling.yml/badge.svg?branch=main)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci-rolling.yml?query=branch:main)
+[![CI (humble)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci.yml/badge.svg)](https://github.com/tpoignonec/ft_tools_ros2/actions/workflows/ci.yml)
+[![Build tests (iron)](../../actions/workflows/ci-iron.yaml/badge.svg?branch=main)](../../actions/workflows/ci-iron.yaml?query=branch:main)
+[![Build tests (rolling)](../../actions/workflows/ci-rolling.yaml/badge.svg?branch=main)](../../actions/workflows/ci-rolling.yaml?query=branch:main)
 
 ***The current devs are based on the humble ROS 2 distribution (Ubuntu 22.04 LTS)***