Remove iron workflow and update readme (backport #434) (#453)

* Remove iron workflow and update readme (#434)

Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
(cherry picked from commit 9ead486)

Signed-off-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
Co-authored-by: Christoph Fröhlich <christophfroehlich@users.noreply.github.com>
Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>

.github/dependabot.yml

@@ -11,3 +11,17 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    target-branch: "humble"
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    target-branch: "jazzy"

README.md

@@ -12,19 +12,15 @@ This package provides an Ignition Gazebo system plugin which instantiates a `ros
 ROS version | Gazebo version | Branch | Binaries hosted at | APT key
 -- | -- | -- | -- | --
 Humble | Fortress | [humble](https://github.com/ros-controls/gz_ros2_control/tree/humble) | https://packages.ros.org | `ros-humble-ign-ros2-control`
-Iron | Edifice | [iron](https://github.com/ros-controls/gz_ros2_control/tree/iron) | only from source |
-Iron | Fortress | [iron](https://github.com/ros-controls/gz_ros2_control/tree/iron) | https://packages.ros.org | `ros-iron-gz-ros2-control`
-Iron | Garden | [iron](https://github.com/ros-controls/gz_ros2_control/tree/iron) | only from source |
-Iron | Harmonic | [iron](https://github.com/ros-controls/gz_ros2_control/tree/iron) | only from source |
-Jazzy | Harmonic | [master](https://github.com/ros-controls/gz_ros2_control/tree/master) | https://packages.ros.org | `ros-jazzy-gz-ros2-control`
-Rolling | Harmonic | [master](https://github.com/ros-controls/gz_ros2_control/tree/master) | https://packages.ros.org | `ros-rolling-gz-ros2-control`
+Jazzy | Harmonic | [jazzy](https://github.com/ros-controls/gz_ros2_control/tree/jazzy) | https://packages.ros.org | `ros-jazzy-gz-ros2-control`
+Rolling | Harmonic | [rolling](https://github.com/ros-controls/gz_ros2_control/tree/rolling) | https://packages.ros.org | `ros-rolling-gz-ros2-control`
 
 ## Build status
 
 ROS 2 Distro | Branch | Build status | Documentation
 :----------: | :----: | :----------: | :-----------:
-**Rolling** | [`master`](https://github.com/ros-controls/gz_ros2_control/tree/master) | [![gazebo_ros2_control CI - Rolling](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-rolling.yaml/badge.svg?branch=master)](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-rolling.yaml) | [Documentation](https://control.ros.org/master/index.html) <br /> [API Reference](https://control.ros.org/master/doc/api/index.html)
-**Iron** | [`iron`](https://github.com/ros-controls/gz_ros2_control/tree/iron) | [![gazebo_ros2_control CI - Iron](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-iron.yaml/badge.svg?branch=iron)](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-iron.yaml) | [Documentation](https://control.ros.org/iron/index.html) <br /> [API Reference](https://control.ros.org/iron/doc/api/index.html)
+**Rolling** | [`rolling`](https://github.com/ros-controls/gz_ros2_control/tree/rolling) | [![gazebo_ros2_control CI - Rolling](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-rolling.yaml/badge.svg?branch=rolling)](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-rolling.yaml) | [Documentation](https://control.ros.org/rolling/index.html) <br /> [API Reference](https://control.ros.org/rolling/doc/api/index.html)
+**Jazzy** | [`jazzy`](https://github.com/ros-controls/gz_ros2_control/tree/jazzy) | [![gazebo_ros2_control CI - Jazzy](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-jazzy.yaml/badge.svg?branch=rolling)](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-jazzy.yaml) | [Documentation](https://control.ros.org/jazzy/index.html) <br /> [API Reference](https://control.ros.org/jazzy/doc/api/index.html)
 **Humble** | [`humble`](https://github.com/ros-controls/gz_ros2_control/tree/humble) | [![ign_ros2_control CI - Humble](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-humble.yaml/badge.svg?branch=humble)](https://github.com/ros-controls/gz_ros2_control/actions/workflows/ci-humble.yaml) | [Documentation](https://control.ros.org/humble/index.html) <br /> [API Reference](https://control.ros.org/humble/doc/api/index.html)
 
 ## Documentation