Merge pull request #3 from 929937690/dev

Minor change on README.md

README.md

@@ -27,9 +27,9 @@ Cite this work:
 - <ins>**Case studies**</ins>
   - [Universal Robots' UR3](1_case_studies/0_cobot/) (hacking a collaborative robot arm)
   - [Mobile Industrial Robots' MiR100](1_case_studies/1_amr/) (hacking an industrial mobile robot)
-  - [Robot Operating System](1_case_studies/3_turtlebot3/) (hacking ROS 1)
+  - [Robot Operating System](1_case_studies/4_ros/) (hacking ROS 1)
   - [Robot Operating System 2](1_case_studies/2_ros2/) (hacking ROS 2)
-  - [TurtleBot 3](1_case_studies/4_ros/) (hacking TurtleBot 3)
+  - [TurtleBot 3](1_case_studies/3_turtlebot3/) (hacking TurtleBot 3)
   - [PX4 autopilot](1_case_studies/5_px4/)
 - [**Writeups**]()
   - <ins>Reconaissance</ins>
@@ -152,4 +152,4 @@ A non-exhaustive list of cybersecurity research in robotics containing various r
 [^19]: Hacker detects a kill switch to take down the gun-toting robot dog https://interestingengineering.com/innovation/gun-toting-robot-dog-kill-switch
 [^20]: Hacker Finds Kill Switch for Submachine Gun–Wielding Robot Dog https://www.vice.com/en/article/akeexk/hacker-finds-kill-switch-for-submachine-gun-wielding-robot-dog
 [^21]: HangZhou Yushu Technology (Unitree) go1 development notes https://github.com/MAVProxyUser/YushuTechUnitreeGo1#pdb-emergency-shut-off-backdoor-no-way-to-disable
-[^22]: Russia's new 'robot dog war machine' is just Chinese household 'toy' with gun taped on https://www.dailystar.co.uk/news/world-news/russias-new-robot-dog-war-27765427
+[^22]: Russia's new 'robot dog war machine' is just Chinese household 'toy' with gun taped on https://www.dailystar.co.uk/news/world-news/russias-new-robot-dog-war-27765427