Update wiki/interfacing/ros1_ros2_bridge.md

Co-authored-by: Nevin Valsaraj <5763537+nevalsar@users.noreply.github.com>

Author: vib2810

wiki/interfacing/ros1_ros2_bridge.md

@@ -29,7 +29,7 @@ Installation instructions are provided in the [ROS 1 bridge](https://github.com/
         colcon build --symlink-install --packages-skip ros1_bridge
         ```
     - Source ROS 1 instal
-        ```
+        ```sh
         source /opt/ros/noetic/setup.bash
         ```
     - Source ROS 2 install