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 87.14%. Comparing base (f2a4229) to head (ebc897e).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #853   +/-   ##
=======================================
  Coverage   87.14%   87.14%           
=======================================
  Files          48       48           
  Lines        1408     1408           
  Branches      300      297    -3     
=======================================
  Hits         1227     1227           
  Misses        168      168           
  Partials       13       13           

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