[Fix] fix flip config of sthsth dataset

[cir7]

Motivation

fix flip config of sth dataset in some config files.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.04 ⚠️

Comparison is base (e38a412) 76.38% compared to head (3bdf73e) 76.35%.

❗ Current head 3bdf73e differs from pull request most recent head bdce110. Consider uploading reports for the commit bdce110 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #2247      +/-   ##
===========================================
- Coverage    76.38%   76.35%   -0.04%     
===========================================
  Files          161      161              
  Lines        12607    12612       +5     
  Branches      2100     2101       +1     
===========================================
  Hits          9630     9630              
- Misses        2486     2491       +5     
  Partials       491      491              

Flag	Coverage Δ
unittests	76.35% <0.00%> (-0.04%)	⬇️

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

Impacted Files	Coverage Δ
mmaction/apis/inference.py	42.04% <0.00%> (-2.54%)	⬇️
mmaction/utils/misc.py	90.00% <ø> (ø)

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