nav2_behaviors: drive_on_heading: return TIMEOUT error code when exceeding time allowance (ros-navigation#4836)

Until now, the NONE error code was returned when exceeding the time
allowance. Let's return the more appropriate TIMEOUT error code instead.

Signed-off-by: Dylan De Coeyer <dylan.decoeyer@quimesis.be>
Signed-off-by: stevedanomodolor <stevedan.o.omodolor@gmail.com>

Author: DylanDeCoeyer-Quimesis

nav2_behaviors/include/nav2_behaviors/plugins/drive_on_heading.hpp

@@ -104,7 +104,7 @@ class DriveOnHeading : public TimedBehavior<ActionT>
       RCLCPP_WARN(
         this->logger_,
         "Exceeded time allowance before reaching the DriveOnHeading goal - Exiting DriveOnHeading");
-      return ResultStatus{Status::FAILED, ActionT::Result::NONE};
+      return ResultStatus{Status::FAILED, ActionT::Result::TIMEOUT};
     }
 
     geometry_msgs::msg::PoseStamped current_pose;