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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5 -> v6

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Release Notes

actions/checkout (actions/checkout)

v6

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 73.28%. Comparing base (81ec11a) to head (782465d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #265   +/-   ##
=======================================
  Coverage   73.28%   73.28%           
=======================================
  Files          30       30           
  Lines         509      509           
  Branches       78       78           
=======================================
  Hits          373      373           
  Misses        122      122           
  Partials       14       14           

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