fix typo in 'synchronized' documentation (#3388)

Author: christianrauch

hardware_interface/doc/asynchronous_components.rst

@@ -20,7 +20,7 @@ Under the ``ros2_control`` tag, a ``properties`` tag can be added to specify the
 * ``affinity``: (optional) The CPU affinity of the thread that runs the hardware component. The affinity is a list of CPU core IDs. The default value is an empty list, which means that the thread can run on any CPU core.
 * ``scheduling_policy``: (optional) The scheduling policy of the thread that runs the hardware component. The scheduling policy can be one of the following values:
 
-  * ``synchronized`` (default): The thread will run with the synchronized with the main controller_manager thread. The controller_manager is responsible for triggering the read and write calls of the hardware component.
+  * ``synchronized`` (default): The thread will run synchronized with the main controller_manager thread. The controller_manager is responsible for triggering the read and write calls of the hardware component.
   * ``detached``: The thread will run independently of the main controller_manager thread. The hardware component will manage its own timing for triggering the read and write calls.
 
 * ``print_warnings``: (optional) If set to ``true``, a warning will be printed if the thread is not able to meet its timing requirements. Default is ``true``.