add sections

Signed-off-by: Yuki Takagi <yuki.takagi@tier4.jp>

Author: yuki-takagi-66

planning/behavior_path_dynamic_avoidance_module/README.md

@@ -19,7 +19,7 @@ The table below lists the avoidance modules that can be used for each situation.
 | avoid not-moving objects | Avoidance Module <br> Dynamic Avoidance Module + Obstacle Avoidance Module |            Avoidance Module            |
 | avoid moving objects     |            Dynamic Avoidance Module + Obstacle Avoidance Module            |     No Module (Under Development)      |
 
-## Overview of drivable area modification
+## Algorithms
 
 ### Filtering obstacles to avoid
 
@@ -53,6 +53,10 @@ Same directional obstacles
 Opposite directional obstacles
 ![opposite_directional_object](./image/opposite_directional_object.svg)
 
+## Example
+
+## Future works
+
 ## Parameters
 
 | Name                                                                  | Unit  | Type   | Description                                                | Default value |