Documentation: PM: runtime: Fix a reference to pm_runtime_autosuspend()

Documentation: PM: runtime: Fix a reference to pm_runtime_autosuspend()

pm_runtime_autosuspend() got accidentally renamed as
__pm_runtime_autosuspend() whereas the intention in the
patch was to rename pm_runtime_put_autosuspend() only.

Fix it.

Fixes: b7d46644e554 ("PM: runtime: Add pm_runtime_put_autosuspend() replacement")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20250410153106.4146265-2-sakari.ailus@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>