update control_toolbox branch (#1241)

control_toolbox has branched out for Humble. This updates the repos file accordingly.

Author: urfeex

Universal_Robots_ROS2_Driver.humble.repos

@@ -30,7 +30,7 @@ repositories:
   control_toolbox:
     type: git
     url: https://github.com/ros-controls/control_toolbox.git
-    version: ros2-master
+    version: humble
   realtime_tools:
     type: git
     url: https://github.com/ros-controls/realtime_tools.git