fix spell

Signed-off-by: yuki-takagi-66 <yuki.takagi@tier4.jp>

Author: yuki-takagi-66

autoware_lanelet2_extension/docs/lanelet2_format_extension.md

@@ -287,8 +287,8 @@ For more details about the `no_drivable_lane` concept and design, please refer t
 
 ### Map Filter Area
 
-If there is a polygon area that has `map_area_filter` tag, the poincloud and objects in this area are removed.
-For more detal, please refer <https://github.com/tier4/map_area_filter>
+If there is a polygon area that has `map_area_filter` tag, the pointcloud and objects in this area are removed.
+For more details, please refer https://github.com/tier4/map_area_filter
 
 ### Localization Landmarks