Fix link to hardware_components

Fix the link to the hardware_components documentation to a working version.

Author: fmauch

hardware_interface/doc/hardware_components_userdoc.rst

@@ -4,7 +4,7 @@ Hardware Components
 -------------------
 Hardware components represent abstraction of physical hardware in ros2_control framework.
 There are three types of hardware Actuator, Sensor and System.
-For details on each type check `Hardware Components description <https://ros-controls.github.io/control.ros.org/getting_started.html#hardware-components>`_.
+For details on each type check `Hardware Components description <https://control.ros.org/master/doc/getting_started/getting_started.html#hardware-components>`_.
 
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