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 68.73%. Comparing base (70a33af) to head (43ecee7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1385   +/-   ##
=======================================
  Coverage   68.73%   68.73%           
=======================================
  Files         119      119           
  Lines        2357     2357           
  Branches      643      646    +3     
=======================================
  Hits         1620     1620           
  Misses        692      692           
  Partials       45       45           

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