Update launch/tier4_perception_launch/launch/object_recognition/detec…

…tion/detector/lidar_dnn_detector.launch.xml

Co-authored-by: Taekjin LEE <[email protected]>

launch/tier4_perception_launch/launch/object_recognition/detection/detector/lidar_dnn_detector.launch.xml

@@ -5,7 +5,7 @@
   <arg name="lidar_detection_model" default="centerpoint" description="options: `centerpoint`, `apollo`, `clustering`"/>
 
   <!-- Lidar detector centerpoint parameters -->
-  <arg name="centerpoint_model_name" default="centerpoint, centerpoint_tiny, centerpoint_sigma"/>
+  <arg name="centerpoint_model_name" default="centerpoint_tiny" description="options: `centerpoint`, `centerpoint_tiny` or `centerpoint_sigma`"/>
   <arg name="centerpoint_model_path" default="$(var data_path)/lidar_centerpoint"/>
   <arg name="lidar_model_param_path" default="$(find-pkg-share lidar_centerpoint)/config"/>