Mention a move_group for both arms

doc/multiple_robot_arms/multiple_robot_arms_tutorial.rst

@@ -530,6 +530,6 @@ If all steps are done, this should bring up all the required components for the
 Step 5: Plan arms motions with MoveIt Move Group Interface.
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-When writing code for multiple move groups, motion planning works the same way it did in previous tutorials. There is an `example here for multiple move groups <https://github.com/Robotawi/panda_arms_ws/blob/master/src/panda_multiple_arms/src/plan_simple_motion.cpp>`_ and a `minimal CMakeLists.txt <https://github.com/Robotawi/panda_arms_ws/blob/master/src/panda_multiple_arms/CMakeLists.txt>`_ file with the dependencies to use Moveit Move Group Interface and describe the arms poses. This `short YouTube video <https://youtu.be/sxUQh91oQxM>`_ shows the resulting arms and hands motions. 
+When writing code for multiple move groups, motion planning works the same way it did in previous tutorials. There is an `example here for multiple move groups <https://github.com/Robotawi/panda_arms_ws/blob/master/src/panda_multiple_arms/src/plan_simple_motion.cpp>`_ and a `minimal CMakeLists.txt <https://github.com/Robotawi/panda_arms_ws/blob/master/src/panda_multiple_arms/CMakeLists.txt>`_ file with the dependencies to use Moveit Move Group Interface and describe the arms poses. This `short YouTube video <https://youtu.be/sxUQh91oQxM>`_ shows the resulting arms and hands motions. This example uses a separate move group for every arm, but we can make a new move group that contains both the ``right_arm`` and ``left_arm`` groups to plan and execute motions for them simultaneously.
 
 Refer to MoveIt tutorials to learn more about the `Move Group Interface <https://ros-planning.github.io/moveit_tutorials/doc/move_group_interface/move_group_interface_tutorial.html>`_.