Update section headers to have at most one Level 1 heading

Author: chishengshih

docs/reference-design/get-started/GoKart/index.md

@@ -1,18 +1,18 @@
-# Overview
+## Overview
 
 This document elaborates the hardware and software configurations for using Autoware for autonomous driving. Hence, it will serve as a guideline to select hardware and software components to build autonomous vehicles. However, this document is NOT prepared as neither step-by-step instructions nor Q&A books, which will be provided as a reference link if available.
 
-# Design Overview
+## Design Overview
 
 ![Meta-Info Radar Chart for Go-Kart Design](images/MetaRadarChart-GoKart.png)
 
 ![Tech Feature Radar Chart for Go-Kart Design](images/TechRadarChart-GoKart.png)
 
-# Who should read
+## Who should read
 
 One is interested in building your small size autonomous vehicles and looks for the place to start with.
 
-# References and Resources
+## References and Resources
 
 - Complete Go-Kart with Autoware documents: [link](https://go-kart-upenn.readthedocs.io/en/latest/)
 - ROS 2 Foxy setup and autonomous code: [link](https://github.com/mlab-upenn/gokart-sensor/tree/ros2_foxy_purepursuit)
@@ -21,50 +21,50 @@ One is interested in building your small size autonomous vehicles and looks for
 
 - STM32 nucleo controller code: [link](https://github.com/mlab-upenn/gokart-mechatronics/tree/main/STM32%20Control)
 
-# Contributors
+## Contributors
 
 -  Autoware Center of Excellence (under Prof. Rahul Mangharam)
 
-# Targeted Use Cases
+## Targeted Use Cases
 
 | Use Cases: |             Education             |              Racing               |                PoC                 |             Open AD Kit             |   Commercial Services/Production    |
 | :--------: | :-------------------------------: | :-------------------------------: | :--------------------------------: | :---------------------------------: | :---------------------------------: |
 |  Go-Kart   | <input type="checkbox" checked /> | <input type="checkbox" checked /> | <input type="checkbox" checked  /> | <input type="checkbox" disabled  /> | <input type="checkbox" disabled  /> |
 
-# ODD
+## ODD
 
 |   ODD   |                Cargo                |                Bus                 |              RoboTaxi               |     Low Speed (Utility) Vehicle     |           Delivery Robot            |
 | :-----: | :---------------------------------: | :--------------------------------: | :---------------------------------: | :---------------------------------: | :---------------------------------: |
 | Go-Kart | <input type="checkbox" disabled  /> | <input type="checkbox" disabled /> | <input type="checkbox" disabled  /> | <input type="checkbox" disabled  /> | <input type="checkbox" disabled  /> |
 
-# Automation Level
+## Automation Level
 
 | Automation Level |                 0                  |                 1                  |                 2                 |                 3                  |                  4                  |                  5                  |
 | :--------------: | :--------------------------------: | :--------------------------------: | :-------------------------------: | :--------------------------------: | :---------------------------------: | :---------------------------------: |
 |     Go-Kart      | <input type="checkbox" checked  /> | <input type="checkbox" checked  /> | <input type="checkbox" checked /> | <input type="checkbox" checked  /> | <input type="checkbox" disabled  /> | <input type="checkbox" disabled  /> |
 
-# System Architecture
+## System Architecture
 
 Autonomous Go-Kart is a one-third scale autonomous go-kart autonomous vehicle for development and prototyping purpose. It can be used for developing and testing software components in Autoware.
 
 ![System Architecture](images/avev_gokart.png)
 
-# Hardware Configuration
+## Hardware Configuration
 
-## Chassis
+### Chassis
 
 - TopKart: [link to purchase]()
 
-## Sensors
+### Sensors
 
 - Lidar: Ouster LIDAR OS1 and Velodyne M1600
 - Camera: OAK-D camera
 - GNSS: RTK-GNSS
 
-## Computing Platforms
+### Computing Platforms
 
 - X86 laptop with nVidia GPU
 
-# Software Configuration
+## Software Configuration
 
 ![GoKart-ComputeSensing.png](images/GoKart-ComputeSensing.png)