Fix iron ci

Author: carter

.github/workflows/iron.yml

@@ -32,6 +32,6 @@ jobs:
       - name: Unit Tests
         run: source /root/.cargo/env; cargo test
       - name: Start rosbridge
-        run: source /opt/ros/humble/setup.bash; ros2 launch rosbridge_server rosbridge_websocket_launch.xml & disown; ros2 run rosapi rosapi_node & sleep 1
+        run: source /opt/ros/iron/setup.bash; ros2 launch rosbridge_server rosbridge_websocket_launch.xml & disown; ros2 run rosapi rosapi_node & sleep 1
       - name: Integration Tests
         run: source /root/.cargo/env; cargo test --features ros2_test -- --test-threads 1