Correct calibration correction launch file in doc (#590)

(cherry picked from commit f6ae958)

Co-authored-by: Robert Wilbrandt <[email protected]>

Author: mergify[bot]

ur_robot_driver/doc/installation/robot_setup.rst

@@ -81,7 +81,7 @@ For this, there exists a helper script:
 
 .. code:: bash
 
-   $ ros2 launch ur_calibration calibration_correction.py.launch \
+   $ ros2 launch ur_calibration calibration_correction.launch.py \
    robot_ip:=<robot_ip> target_filename:="${HOME}/my_robot_calibration.yaml"
 
 For the parameter ``robot_ip`` insert the IP address on which the ROS pc can reach the robot. As