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 Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.49%. Comparing base (f9911de) to head (feb08fd).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #43   +/-   ##
=======================================
  Coverage   48.49%   48.49%           
=======================================
  Files          25       25           
  Lines        5650     5650           
=======================================
  Hits         2740     2740           
  Misses       2166     2166           
  Partials      744      744           

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