[Fix] Fix flow_warp comment

[ckkelvinchan]

Motivation

As reported in #638, the comment of flow_warp has a problem. This PR fixes the comment by changing (w, h, 2) to (h, w, 2).

Modification

Modify mmedit/models/common/flow_warp.py.

[codecov]

Codecov Report

Merging #655 (82c5192) into master (3c872e0) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #655      +/-   ##
==========================================
+ Coverage   80.49%   80.51%   +0.01%     
==========================================
  Files         198      198              
  Lines       11233    11233              
  Branches     1795     1795              
==========================================
+ Hits         9042     9044       +2     
+ Misses       1915     1914       -1     
+ Partials      276      275       -1     

Flag	Coverage Δ
unittests	80.48% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
mmedit/models/common/flow_warp.py	100.00% <100.00%> (ø)
...ls/components/stylegan2/generator_discriminator.py	86.14% <0.00%> (+1.20%)	⬆️

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