chore(deps): update actions/checkout action to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v3 -> v5

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Release Notes

actions/checkout (actions/checkout)

v5

Compare Source

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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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.92%. Comparing base (a94e2b5) to head (039aec0).
⚠️ Report is 104 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #656      +/-   ##
==========================================
+ Coverage   92.38%   92.92%   +0.53%     
==========================================
  Files          26       27       +1     
  Lines        1944     2148     +204     
  Branches      405      450      +45     
==========================================
+ Hits         1796     1996     +200     
- Misses        102      103       +1     
- Partials       46       49       +3     

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