Update docs/writing_a_simple_publisher_and_subscriber.md

Co-authored-by: Esteve Fernandez <33620+esteve@users.noreply.github.com>

docs/writing_a_simple_publisher_and_subscriber.md

@@ -10,7 +10,7 @@ In this tutorial you will create a pair of
 
 Since Rust doesn't have inheritance, it's not possible to inherit from `Node` as is common practice in [`rclcpp`](https://docs.ros.org/en/humble/Tutorials/Beginner-Client-Libraries/Writing-A-Simple-Cpp-Publisher-And-Subscriber.html) or [`rclpy`](https://docs.ros.org/en/humble/Tutorials/Beginner-Client-Libraries/Writing-A-Simple-Py-Publisher-And-Subscriber.html).
 
-The code used in these examples can be found [here](https://gitlab.com/ros21923912/simple_ros2_node/-/tree/more_simple_nodes?ref_type=heads)  
+The code used in these examples can be found [here](https://github.com/ros2-rust/ros2_rust/tree/main/examples/rust_pubsub)
 <div style="margin-left:20px;">
 <details><summary>Side-note on dependencies</summary>