Update ros2_nullspace_control.md

tutorials/ros2_nullspace_control.md

@@ -25,4 +25,4 @@ elbow_pose_controller[wbc_ros/CartesianPositionController] active
 ```
 Here, the end effector task has a higher priority (0) than the elbow task (1). 
 
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+[[Previous Tutorial]](https://arc-opt.github.io/Documentation/tutorials/ros2_joint_space_control.html)[[Back to Main Page]](https://arc-opt.github.io/Documentation)[[Next Tutorial]](https://arc-opt.github.io/Documentation/tutorials/python/vel_introductory_example.html)