hokuyo_utm30lx.urdf.xacro does not publish laser-data

[ProfJust]

Using the Gazebo-Simulation for the Summit_XL with ROS-Noetic on Ubuntu-Focal,
I noticed that the simulated Hokuyo UTM30LX-Sensor does not publish its Laser-Scans.
So in RViZ one cannot see any Laser-Points.

To solve this problem you just have to change Line 43 in hokuyo_utm30lx.urdf.xacro

from <sensor_hokuyo_utm_gazebo/>
to <xacro:sensor_hokuyo_utm_gazebo/>

I hope this hint will be useful.