chore(deps): update actions/checkout action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v4

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• url-helper.ts now leverages well-known environment variables by @​jww3 in https://github.com/actions/checkout/pull/1941
• Expand unit test coverage for isGhes by @​jww3 in https://github.com/actions/checkout/pull/1946

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Latest commit: 52b24d1

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.65%. Comparing base (c2f592d) to head (52b24d1).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #186   +/-   ##
=======================================
  Coverage   79.65%   79.65%           
=======================================
  Files          17       17           
  Lines         516      516           
  Branches      104      104           
=======================================
  Hits          411      411           
  Misses        102      102           
  Partials        3        3           

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