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 93.06%. Comparing base (7a24e83) to head (d997ae9).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1508   +/-   ##
=======================================
  Coverage   93.06%   93.06%           
=======================================
  Files           1        1           
  Lines         245      245           
  Branches       49       49           
=======================================
  Hits          228      228           
  Misses         17       17           

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