Humble (#5901) (#5913)

* Update URDF-Main.rst



* Update URDF-Main.rst



* Update URDF-Main.rst



* Update URDF-Main.rst



* Update source/Tutorials/Intermediate/URDF/URDF-Main.rst




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(cherry picked from commit 645abee)

Signed-off-by: Arashdeep Singh <[email protected]>
Co-authored-by: Arashdeep Singh <[email protected]>
Co-authored-by: Tomoya Fujita <[email protected]>

Author: 3 people

source/Tutorials/Intermediate/URDF/URDF-Main.rst

@@ -8,6 +8,7 @@ URDF
 ====
 
 URDF (Unified Robot Description Format) is a file format for specifying the geometry and organization of robots in ROS.
+A URDF file follows the XML format as described on `here <https://wiki.ros.org/urdf/XML>`_.
 
 .. contents:: Contents
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