update node in workflows to 24

[derrickaw]

Problem: a few workflows try to still use Node 16,18,20.
Plan: bump to 24.

[derrickaw]

/gemini review

[github-actions]

📋 Review Summary

This pull request updates the Node.js version configured across several GitHub Actions workflows and .github/ACTIONS.md documentation from older versions (16, 18, and 20) to Node 24. The changes are clean, consistent, and align with actions/setup-node@v7 across the repository.

🔍 General Feedback

• All actions/setup-node steps across .github/workflows and .github/ACTIONS.md are now consistently targeting Node 24.
• Note that typescript_tests.yml only triggers automatically on pull requests when files under sdks/typescript/** are modified; it may be worth triggering a manual workflow_dispatch run or verifying that sdks/typescript builds and passes tests cleanly under Node 24.

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[github-actions]

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[github-actions]

📋 Review Summary

This PR cleanly updates the actions/setup-node configuration across GitHub Actions workflows and documentation from Node.js 16/20 to Node.js 24 LTS. The changes are straightforward, consistent across the affected CI workflows, and have been verified to work with the TypeScript SDK test suite.

🔍 General Feedback

• All actions/setup-node version references across .github/workflows/ and .github/ACTIONS.md are consistently updated to Node 24.
• Follow-up consideration (out of scope for this workflow-focused PR): sdks/typescript/container/Dockerfile still uses FROM node:18.18-bullseye-slim and scripts/ci/pr-bot/package.json still pins @types/node to ^16.11.7, which may be worth updating in a separate change to align runtime/type definitions with the CI environment.

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