Update checkout action to version 4

[yhouyang02]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.67%. Comparing base (1fbc86d) to head (092b12f).
⚠️ Report is 2 commits behind head on otter.

Additional details and impacted files

@@           Coverage Diff           @@
##            otter      #95   +/-   ##
=======================================
  Coverage   97.67%   97.67%           
=======================================
  Files          11       11           
  Lines         430      430           
  Branches       69       69           
=======================================
  Hits          420      420           
  Misses          6        6           
  Partials        4        4           

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[Copilot]

Pull request overview

This PR updates the GitHub Actions checkout action from version 2 to version 4 in the deploy workflow. The update brings the deploy.yml workflow in line with other workflow files (docs.yml and docs-preview.yml) that already use v4, ensuring the workflow benefits from improvements, security patches, and the updated Node.js runtime.

Changes:

• Updated actions/checkout from @v2 to @v4 in deploy.yml

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[Copilot]

While this file is being updated to use actions/checkout@v4, the build.yml workflow still uses actions/checkout@v2 in two places (lines 20 and 45). For consistency and to ensure all workflows benefit from the latest improvements, security patches, and Node.js runtime updates in checkout v4, consider updating build.yml as well.