[Fix] Fix key error in configs

[fangyixiao18]

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Modification

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Checklist

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• Bug fixes are fully covered by unit tests, the case that causes the bug should be added in the unit tests.
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[codecov]

Codecov Report

Base: 81.65% // Head: 81.61% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (d35a81c) compared to base (83e0917).
Patch has no changes to coverable lines.

❗ Current head d35a81c differs from pull request most recent head e409f66. Consider uploading reports for the commit e409f66 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x     #630      +/-   ##
===========================================
- Coverage    81.65%   81.61%   -0.05%     
===========================================
  Files          135      135              
  Lines         4961     4961              
  Branches       672      672              
===========================================
- Hits          4051     4049       -2     
  Misses         773      773              
- Partials       137      139       +2     

Flag	Coverage Δ
unittests	81.61% <ø> (-0.05%)	⬇️

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

Impacted Files	Coverage Δ
mmselfsup/datasets/transforms/processing.py	88.79% <0.00%> (-0.44%)	⬇️

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