Upgrade GitHub Actions for Node 24 compatibility

[salmanmkc]

Summary

This PR upgrades GitHub Actions to their latest versions for Node.js 24 compatibility and security updates.

Changes

Action	Old Version(s)	New Version	Files
actions/checkout	v2, v3, v4	v6	build_documentation.yml, build_pr_documentation.yml, quality.yml, test_models.yml
actions/setup-node	v4	v6	build_documentation.yml, build_pr_documentation.yml
actions/setup-python	v2, v4, v5	v6	build_documentation.yml, build_pr_documentation.yml, quality.yml, test_models.yml
actions/upload-artifact	v4	v6	build_pr_documentation.yml

Why these changes?

• Keeps actions up to date with latest stable releases
• Updated actions include security fixes and new features

Testing

These changes only update action versions and don't modify workflow logic.