Gazebo README setup noetic packages

stretch_gazebo/README.md

@@ -30,7 +30,7 @@ These set up instructions will not be required on newly shipped robots. Follow t
 
 ```bash
     cd ~/catkin_ws/src
-    git clone https://github.com/hello-robot/stretch_ros
+    git clone https://github.com/hello-robot/stretch_ros -b dev/noetic
     git clone https://github.com/pal-robotics/realsense_gazebo_plugin
     cd ~/catkin_ws
     rosdep install --from-paths src --ignore-src -r -y