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 80.95%. Comparing base (2718da4) to head (f116bb3).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #149   +/-   ##
=======================================
  Coverage   80.95%   80.95%           
=======================================
  Files           2        2           
  Lines         126      126           
  Branches       10       10           
=======================================
  Hits          102      102           
  Misses         20       20           
  Partials        4        4           

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