fixed typo

Author: ChinYikMing

carla_ackermann_control/src/carla_ackermann_control/carla_ackermann_control_node.py

@@ -404,7 +404,7 @@ def control_stop_and_reverse(self):
                 self.info.output.throttle = 0.0
 
         elif numpy.sign(self.info.current.speed) * numpy.sign(self.info.target.speed) == -1:
-            # requrest for change of driving direction
+            # request for change of driving direction
             # first we have to come to full stop before changing driving
             # direction
             self.loginfo("VehicleControl: Request change of driving direction."