FIX: do not need to add .py in Humble

refer to https://discourse.articulatedrobotics.xyz/t/ros2-control-spawner-py-not-found/124/2

src/rl_sar/launch/gazebo.launch.py

@@ -52,14 +52,14 @@ def generate_launch_description():
 
     joint_state_broadcaster_node = Node(
         package="controller_manager",
-        executable="spawner.py",
+        executable="spawner",
         arguments=["joint_state_broadcaster"],
         output="screen",
     )
 
     robot_joint_controller_node = Node(
         package="controller_manager",
-        executable="spawner.py",
+        executable="spawner",
         arguments=["robot_joint_controller"],
         output="screen",
     )

src/robots/a1_description/launch/group_gazebo.launch.py

@@ -38,14 +38,14 @@ def generate_launch_description():
 
     joint_state_broadcaster_node = Node(
         package="controller_manager",
-        executable="spawner.py",
+        executable="spawner",
         arguments=["joint_state_broadcaster"],
         output='screen',
     )
 
     robot_joint_controller_node = Node(
         package="controller_manager",
-        executable="spawner.py",
+        executable="spawner",
         arguments=["robot_joint_controller"],
         output='screen',
     )

src/robots/a1_description/launch/single_gazebo.launch.py

@@ -46,7 +46,7 @@ def generate_launch_description():
 
     controller_nodes = [Node(
         package="controller_manager",
-        executable="spawner.py",
+        executable="spawner",
         arguments=[name],
         output='screen',
     ) for name in controller_names]