docs(planning): add dynamic_obstacle_stop to the list of modules (#6389)

Signed-off-by: Maxime CLEMENT <maxime.clement@tier4.jp>

Author: maxime-clem

planning/.pages

@@ -24,6 +24,7 @@ nav:
         - 'Blind Spot': planning/behavior_velocity_blind_spot_module
         - 'Crosswalk': planning/behavior_velocity_crosswalk_module
         - 'Detection Area': planning/behavior_velocity_detection_area_module
+        - 'Dynamic Obstacle Stop': planning/behavior_velocity_dynamic_obstacle_stop_module
         - 'Intersection': planning/behavior_velocity_intersection_module
         - 'No Drivable Lane': planning/behavior_velocity_no_drivable_lane_module
         - 'No Stopping Area': planning/behavior_velocity_no_stopping_area_module