update GitHub actions to Node 24 compatible versions

[Muskan-khar]

Resolves #8674

###Changes:

• Updated GitHub Actions (actions/checkout, actions/setup-node, etc.) to their latest versions compatible with Node.js 24.
• Ensured workflows no longer rely on deprecated Node.js 20 versions.
• Verified that local build and test commands run successfully

###Note:
node-version: 20 intentionally NOT changed
(controls p5.js build version, separate concern)

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated

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