Update source/Tutorials/Intermediate/Launch/Using-ROS2-Launch-For-Large-Projects.rst

Signed-off-by: Katherine Scott <[email protected]>

Author: kscottz

source/Tutorials/Intermediate/Launch/Using-ROS2-Launch-For-Large-Projects.rst

@@ -46,6 +46,7 @@ In this tutorial, we'll go over this launch file and all related features used.
 .. note:: Launch files can be written in XML, YAML, or Python format.
   Throughout this tutorial, launch files are shown in all three formats using tabs.
   You can choose whichever format you prefer - they are functionally equivalent.
+  Wherever you see the file name ``launch_turtlesim_launch`` make sure to use the correct file extension for your launch file type (i.e. ``launch_turtlesim_launch.py`` for Python, ``launch_turtlesim_launch.xml`` for XML, and ``launch_turtlesim_launch.yaml`` for YAML.
 
 Writing launch files
 --------------------