Fix publish workflow failure caused by npm/Node engine mismatch

[Copilot]

The publish GitHub Actions job was failing before install/build/test because it upgraded to npm@latest while still running on Node 20. Recent npm releases require a newer Node runtime, so the workflow exited with an EBADENGINE error.

• Workflow runtime update

  • Bump the publish job from Node 20 to Node 24 in .github/workflows/publish.yml
  • Keep the existing trusted publishing flow and npm@latest upgrade step unchanged

• Why this fixes the failure

  • The job currently does:

    - name: Setup Node.js
      uses: actions/setup-node@v4
      with:
        node-version: '24'
        registry-url: 'https://registry.npmjs.org'
    
    - name: Update npm
      run: npm install -g npm@latest

  • This aligns the runtime with the engine requirements of current npm releases so the publish pipeline can proceed to dependency install, build, test, and publish