Change branch of control_toolbox repo for humble (backport #102) (#103)

Author: mergify[bot]

ros_controls.humble.repos

@@ -2,7 +2,7 @@ repositories:
   ros-controls/control_toolbox:
     type: git
     url: https://github.com/ros-controls/control_toolbox.git
-    version: ros2-master
+    version: humble
   ros-controls/ros2_control:
     type: git
     url: https://github.com/ros-controls/ros2_control.git