fix(start_planner): fix safety_check_time_horizon (autowarefoundation#875)

Signed-off-by: kosuke55 <kosuke.tnp@gmail.com>

Author: kosuke55

autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/start_planner/start_planner.param.yaml

@@ -92,7 +92,7 @@
           delay_until_departure: 1.0
         # For target object filtering
         target_filtering:
-          safety_check_time_horizon: 5.0
+          safety_check_time_horizon: 10.0
           safety_check_time_resolution: 1.0
           # detection range
           object_check_forward_distance: 10.0