Update planning/behavior_path_planner/README.md

Co-authored-by: Takamasa Horibe <horibe.takamasa@gmail.com>

planning/behavior_path_planner/README.md

@@ -15,7 +15,7 @@ The following modules are currently supported:
 - **Lane Following**: Generate lane centerline from map.
 - **Lane Change**: Performs a lane change. This module is performed when it is necessary and a collision check with other vehicles is cleared.
 - **Obstacle Avoidance**: Perform an obstacle avoidance. This module is for avoidance of a vehicle parked on the edge of the lane or overtaking a low-speed obstacle.
-- **Pull Over**: Performs a pull over. This module is performed when ego-vehicle is in the road lane and goal is in the shoulder lane. ego-vehicle will stop at the goal.
+- **Pull Over**: Performs a pull over. This module is performed when ego-vehicle is in the road lane and the goal is in the shoulder lane. The ego-vehicle will stop at the goal.
 - **Pull Out**: Performs a pull out. This module is performed when ego-vehicle is stationary and footprint of ego-vehicle is included in shoulder lane. This module ends when ego-vehicle merges into the road.
 - **Side Shift**: (For remote control) Shift the path to left or right according to an external instruction.