Fix the URL to setup hardware Aloha Stationary in the example document (#766)

Author: yongjincho

examples/9_use_aloha.md

@@ -2,7 +2,7 @@ This tutorial explains how to use [Aloha and Aloha 2 stationary](https://www.tro
 
 ## Setup
 
-Follow the [documentation from Trossen Robotics](https://docs.trossenrobotics.com/aloha_docs/getting_started/stationary/hardware_setup.html) for setting up the hardware and plugging the 4 arms and 4 cameras to your computer.
+Follow the [documentation from Trossen Robotics](https://docs.trossenrobotics.com/aloha_docs/2.0/getting_started/stationary/hardware_setup.html) for setting up the hardware and plugging the 4 arms and 4 cameras to your computer.
 
 
 ## Install LeRobot