update comments to current parameter name

[v4hn]

I just saw these comments in #2799 and they should be updated.
We renamed the parameter earlier this year because MSVC apparently reserves "near" as a keyword.

[codecov]

Codecov Report

Merging #2853 (6747ca5) into master (bd981fb) will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2853      +/-   ##
==========================================
+ Coverage   60.84%   60.88%   +0.05%     
==========================================
  Files         366      366              
  Lines       31709    31709              
==========================================
+ Hits        19289    19302      +13     
+ Misses      12420    12407      -13     

Impacted Files	Coverage Δ
...bot_state/include/moveit/robot_state/robot_state.h	85.04% <ø> (ø)
...nning_scene_monitor/src/planning_scene_monitor.cpp	68.27% <0.00%> (+0.14%)	⬆️
...raint_samplers/src/default_constraint_samplers.cpp	80.72% <0.00%> (+0.30%)	⬆️
...ipulation/pick_place/src/manipulation_pipeline.cpp	71.30% <0.00%> (+1.86%)	⬆️
...meterization/work_space/pose_model_state_space.cpp	83.02% <0.00%> (+1.89%)	⬆️
.../ompl_interface/src/detail/constrained_sampler.cpp	59.46% <0.00%> (+16.22%)	⬆️

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