chore(deps): update actions/checkout digest to b4ffde6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	digest	8ade135 -> b4ffde6

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[codecov-commenter]

Codecov Report

Merging #107 (5fad8a1) into master (95db97a) will not change coverage. The diff coverage is n/a.

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@@           Coverage Diff           @@
##           master     #107   +/-   ##
=======================================
  Coverage   97.67%   97.67%           
=======================================
  Files          32       32           
  Lines        1334     1334           
=======================================
  Hits         1303     1303           
  Misses         31       31           

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