docs(obstacle avoidance planner): update the docs

[takayuki5168]

Description

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[github-actions]

Documentation URL: https://autowarefoundation.github.io/autoware.universe/pr-2963/
Modified URLs:

• https://autowarefoundation.github.io/autoware.universe/pr-2963/planning/obstacle_avoidance_planner/
• https://autowarefoundation.github.io/autoware.universe/pr-2963/planning/obstacle_avoidance_planner/debug/
• https://autowarefoundation.github.io/autoware.universe/pr-2963/planning/obstacle_avoidance_planner/eb/
• https://autowarefoundation.github.io/autoware.universe/pr-2963/planning/obstacle_avoidance_planner/mpt/

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (d8c826c) 11.95% compared to head (dac4301) 11.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2963   +/-   ##
=======================================
  Coverage   11.95%   11.95%           
=======================================
  Files        1324     1324           
  Lines       92113    92113           
  Branches    24625    24625           
=======================================
  Hits        11012    11012           
  Misses      69686    69686           
  Partials    11415    11415           

Flag	Coverage Δ		*Carryforward flag
differential	34.91% <0.00%> (?)
total	11.95% <ø> (+<0.01%)	⬆️	Carriedforward from d8c826c

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
...ng/obstacle_avoidance_planner/src/debug_marker.cpp	0.00% <0.00%> (ø)

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[takayuki5168]

@kosuke55 Could you approve the PR?
Just modifying the document.