chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 → v6

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Release Notes

actions/checkout (actions/checkout)

v6

Compare Source

v5

Compare Source

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.13%. Comparing base (40e45ef) to head (08b7337).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #853   +/-   ##
=======================================
  Coverage   87.13%   87.13%           
=======================================
  Files          48       48           
  Lines        1407     1407           
  Branches      300      297    -3     
=======================================
  Hits         1226     1226           
  Misses        168      168           
  Partials       13       13           

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