[Docs] Kitti readme

[DCNSW]

Modification

kitti_det.md.

[codecov]

Codecov Report

Merging #953 (3d6e9a1) into master (075f444) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #953   +/-   ##
=======================================
  Coverage   49.33%   49.33%           
=======================================
  Files         210      210           
  Lines       16021    16023    +2     
  Branches     2556     2556           
=======================================
+ Hits         7904     7905    +1     
- Misses       7614     7615    +1     
  Partials      503      503           

Flag	Coverage Δ
unittests	49.33% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmdet3d/ops/voxel/voxelize.py	80.76% <0.00%> (-1.24%)	⬇️

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