refactor(mission_planner): use lower case

[purewater0901]

Description

Use lower case for the reroute safety check function

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[kosuke55]

LGTM

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (68a24de) 14.36% compared to head (6bb11ba) 14.36%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4079      +/-   ##
==========================================
- Coverage   14.36%   14.36%   -0.01%     
==========================================
  Files        1566     1566              
  Lines      107737   107720      -17     
  Branches    31175    31168       -7     
==========================================
- Hits        15481    15476       -5     
+ Misses      75429    75419      -10     
+ Partials    16827    16825       -2     

Flag	Coverage Δ		*Carryforward flag
differential	12.75% <0.00%> (?)
total	14.36% <ø> (-0.01%)	⬇️	Carriedforward from 435cdf9

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

Impacted Files	Coverage Δ
...occupancy_grid_map_binary_bayes_filter_updater.cpp	0.00% <ø> (ø)
...nner/utils/lane_change/lane_change_module_data.hpp	50.00% <ø> (ø)
...or_path_planner/src/behavior_path_planner_node.cpp	18.44% <ø> (ø)
...th_planner/src/scene_module/lane_change/normal.cpp	4.42% <ø> (-0.48%)	⬇️
...avior_path_planner/src/utils/lane_change/utils.cpp	0.44% <ø> (ø)
...on_planner/src/mission_planner/mission_planner.cpp	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes

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