Use iron for cloned repositories

make_help_scripts/deploy_defines

@@ -17,7 +17,7 @@ api_branch="master"
 # definitions for multiversion
 # branches on which the temporary commits are created and which branch should be checked out in the subrepositories
 # ["branch checked out for multiversion"]="branch checked out for all subrepos"
-declare -A branch_version=( ["foxy"]="foxy" ["galactic"]="galactic" ["humble"]="humble" ["iron"]="master" ["master"]="master") # master is rolling
+declare -A branch_version=( ["foxy"]="foxy" ["galactic"]="galactic" ["humble"]="humble" ["iron"]="iron" ["master"]="master") # master is rolling
 
 # the subrepos which are cloned into the branches and, optionally, their corresponding PR for checkout
 declare -A subrepo_url=( ["ros2_control"]="https://github.com/ros-controls/ros2_control" ["ros2_controllers"]="https://github.com/ros-controls/ros2_controllers" ["ros2_control_demos"]="https://github.com/ros-controls/ros2_control_demos" ["gazebo_ros2_control"]="https://github.com/ros-controls/gazebo_ros2_control" ["gz_ros2_control"]="https://github.com/ros-controls/gz_ros2_control")