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 Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@           Coverage Diff            @@
##             main      #187   +/-   ##
========================================
  Coverage        ?   100.00%           
========================================
  Files           ?         3           
  Lines           ?        33           
  Branches        ?         4           
========================================
  Hits            ?        33           
  Misses          ?         0           
  Partials        ?         0           

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