chore(deps): update actions/checkout action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v5.0.0 -> v6.0.0
actions/checkout	action	major	v5 -> v6

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Release Notes

actions/checkout (actions/checkout)

v6.0.0

Compare Source

v5.0.1

Compare Source

What's Changed

• Port v6 cleanup to v5 by @​ericsciple in #​2301

Full Changelog: actions/checkout@v5...v5.0.1

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Configuration

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.62%. Comparing base (4eb7024) to head (d4acc75).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1169   +/-   ##
=======================================
  Coverage   59.62%   59.62%           
=======================================
  Files          35       35           
  Lines        1008     1008           
  Branches      342      342           
=======================================
  Hits          601      601           
  Misses        339      339           
  Partials       68       68           

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