Update doc/six_wheeler_steering_controller.rst

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: silanus23

doc/six_wheeler_steering_controller.rst

@@ -77,7 +77,7 @@ Controller Parameters
    * - Parameter
      - Description
    * - ``traction_joints``
-     - A list of the six drive wheel joint names from the robot's URDF model.
+     - A list of the six drive wheel joint names from the robot's URDF model, in the following order: front-left, front-right, middle-left, middle-right, rear-left, rear-right.
    * - ``steering_joints``
      - A list of the four corner steering joint names from the robot's URDF model.
    * - ``d1``