fix(obstacle_cruise_planner): update doc name

[takayuki5168]

Signed-off-by: Takayuki Murooka takayuki5168@gmail.com

Description

update doc name to README.md

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[codecov]

Codecov Report

Merging #1516 (0f7b4db) into main (05f6a6b) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1516      +/-   ##
==========================================
- Coverage   10.36%   10.33%   -0.04%     
==========================================
  Files        1135     1135              
  Lines       79574    79849     +275     
  Branches    18534    18534              
==========================================
  Hits         8251     8251              
- Misses      63122    63397     +275     
  Partials     8201     8201              

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <ø> (?)
total	10.35% <ø> (ø)		Carriedforward from 05f6a6b

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

Impacted Files	Coverage Δ
planning/obstacle_cruise_planner/src/node.cpp	0.00% <0.00%> (ø)

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