Update actions/checkout action to v6

[daniel-renovator]

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]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.35%. Comparing base (753c98f) to head (867ec3b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #81   +/-   ##
=======================================
  Coverage   95.35%   95.35%           
=======================================
  Files          12       12           
  Lines         474      474           
  Branches       59       59           
=======================================
  Hits          452      452           
  Misses         22       22           

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