[Fix] Rename init_weight to init_weights

[MeowZheng]

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@ee041ce). Click here to learn what that means.
The diff coverage is 75.71%.

@@            Coverage Diff            @@
##             master     #971   +/-   ##
=========================================
  Coverage          ?   65.73%           
=========================================
  Files             ?      150           
  Lines             ?     9517           
  Branches          ?     1726           
=========================================
  Hits              ?     6256           
  Misses            ?     2938           
  Partials          ?      323           

Flag	Coverage Δ
unittests	65.73% <75.71%> (?)

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Impacted Files	Coverage Δ
mmcv/ops/box_iou_rotated.py	100.00% <ø> (ø)
mmcv/runner/base_module.py	78.78% <75.00%> (ø)
mmcv/ops/roi_align_rotated.py	75.38% <75.38%> (ø)
mmcv/ops/__init__.py	100.00% <100.00%> (ø)

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