Update hardware_interface/doc/hardware_interface_types_userdoc.rst

hardware_interface/doc/hardware_interface_types_userdoc.rst

@@ -13,7 +13,7 @@ Overview
 *****************************
 Hardware in ros2_control is described as URDF and internally parsed and encapsulated as ``HardwareInfo``.
 The definition can be found in the `ros2_control repository <https://github.com/ros-controls/ros2_control/blob/master/hardware_interface/include/hardware_interface/hardware_info.hpp>`_.
-You can check this classes to see what attributes are available for each of the xml tags.
+You can check the structs defined there to see what attributes are available for each of the xml tags.
 A generic example which shows the structure is provided below. More specific examples can be found in the Example part below.
 
 .. code:: xml