fix slowonly url

[kennymckormick]

Fix #248

[codecov]

Codecov Report

Merging #249 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #249      +/-   ##
==========================================
- Coverage   85.08%   85.00%   -0.08%     
==========================================
  Files          81       81              
  Lines        5276     5276              
  Branches      849      849              
==========================================
- Hits         4489     4485       -4     
- Misses        648      651       +3     
- Partials      139      140       +1     

Flag	Coverage Δ
#unittests	85.00% <ø> (-0.08%)	⬇️

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Impacted Files	Coverage Δ
mmaction/datasets/pipelines/augmentations.py	94.18% <0.00%> (-0.78%)	⬇️

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