Update README.md (#31)

Signed-off-by: Dharini Dutia <[email protected]>
(cherry picked from commit 9cbd515)

README.md

@@ -27,7 +27,11 @@ ROS version | Gazebo version | libSDFormat version | Branch | Binaries hosted at
 Galactic | Citadel | 9.x | [galactic](https://github.com/ros/ros_ign/tree/galactic) | https://packages.ros.org
 Galactic | Edifice | 11.x | [galactic](https://github.com/ros/ros_ign/tree/galactic) | only from source
 Galactic | Fortress | 12.x | [galactic](https://github.com/ros/ros_ign/tree/galactic) | only from source
-Humble | Fortress | 12.x | [ros2](https://github.com/ros/ros_ign/tree/ros2) | https://packages.ros.org
-Humble | Garden | 13.x | [ros2](https://github.com/ros/ros_ign/tree/ros2) | only from source
-Rolling | Fortress | 12.x | [ros2](https://github.com/ros/ros_ign/tree/ros2) | https://packages.ros.org
-Rolling | Garden | 13.x | [ros2](https://github.com/ros/ros_ign/tree/ros2) | only from source
+Humble | Fortress | 12.x | [humble](https://github.com/ros/sdformat_urdf/tree/humble) | https://packages.ros.org
+Humble | Garden | 13.x | [humble](https://github.com/ros/sdformat_urdf/tree/humble) | only from source
+Humble | Harmonic | 14.x | [humble](https://github.com/ros/sdformat_urdf/tree/humble) | only from source
+Iron | Fortress | 12.x | [iron](https://github.com/ros/sdformat_urdf/tree/iron) | https://packages.ros.org
+Iron | Garden | 13.x | [iron](https://github.com/ros/sdformat_urdf/tree/iron) | only from source
+Iron | Harmonic | 14.x | [iron](https://github.com/ros/sdformat_urdf/tree/iron) | only from source
+Jazzy | Harmonic | 14.x | [jazzy](https://github.com/ros/sdformat_urdf/tree/jazzy) | https://packages.ros.org
+Rolling | Harmonic | 14.x | [rolling](https://github.com/ros/sdformat_urdf/tree/rolling) | https://packages.ros.org