fix param (autowarefoundation#958)

Signed-off-by: Sho Iwasawa <sho.iwasawa.2@tier4.jp>

Author: zusizusi

autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_velocity_planner/intersection.param.yaml

@@ -101,7 +101,7 @@
           creep_velocity: 0.8333
         peeking_offset: -0.5
         occlusion_required_clearance_distance: 55.0
-        possible_object_bbox: [1.9, 2.5]
+        possible_object_bbox: [1.7, 2.5]
         ignore_parked_vehicle_speed_threshold: 0.8333
         occlusion_detection_hold_time: 1.5
         temporal_stop_time_before_peeking: 0.1