Update ur_msgs upstream branch (#1125)

Author: Felix Exner (fexner)

Universal_Robots_ROS2_Driver.iron.repos

@@ -10,7 +10,7 @@ repositories:
   ur_msgs:
     type: git
     url: https://github.com/ros-industrial/ur_msgs.git
-    version: foxy-devel
+    version: humble-devel
   ros2_control:
     type: git
     url: https://github.com/ros-controls/ros2_control.git