[CI] JointStateBroadcasterTest fails on RHEL/Humble

[christophfroehlich]

what is different from humble to later distros? (RHEL 8 vs RHEL 9!)
Humble fails: https://github.com/ros-controls/ros2_controllers/actions/runs/9001159902/job/24726794017?pr=1121
Iron not: https://github.com/ros-controls/ros2_controllers/actions/runs/8994884125/job/24709018370

[github-actions]

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