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

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
actions/checkout	action	major	v4	source

Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.

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Release Notes

actions/checkout (actions/checkout)

v4

Compare Source

• Check out other refs/* by commit if provided, fall back to ref by @​orhantoy in https://github.com/actions/checkout/pull/1924

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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• [ ] If you want to rebase/retry this PR, check this box

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[codecov-commenter]

Codecov Report

Merging #349 (9eff8b1) into master (0bc3e44) will not change coverage. Report is 8 commits behind head on master. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #349   +/-   ##
=======================================
  Coverage   43.88%   43.88%           
=======================================
  Files           4        4           
  Lines         139      139           
  Branches       35       35           
=======================================
  Hits           61       61           
  Misses         78       78           

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