chore(deps): bump docker distribution for checksum mismatch

[gnanderson]

• bumps github.com/docker/distribution from v2.8.0 to v2.8.1
• see v2.8.0 tag does not match checksum distribution/distribution#3590

[codecov-commenter]

Codecov Report

Merging #589 (a243ede) into master (1744880) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #589   +/-   ##
=======================================
  Coverage   53.23%   53.23%           
=======================================
  Files          90       90           
  Lines        7510     7510           
=======================================
  Hits         3998     3998           
  Misses       2961     2961           
  Partials      551      551           

Flag	Coverage Δ
ubuntu-latest	53.23% <ø> (ø)

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