message: update changelog with teleop update
diff: ## 0.x - UNRELEASED
  + * `franka_example_controllers`: Extend the `teleop_joint_pd_example_controller` with joint walls to actively avoid position or velocity limit violations.
  +
  * `franka_gazebo`:
  - Add JointPosition and JointVelocity Interface
  - Fix: Robot now keeps position when no controller is running
  