Update Node.js CI matrix to remove 16.x and add 22.x

[Copilot]

PR checks were failing in the build (16.x) job because the workflow still targeted an outdated Node runtime. This change updates the CI test matrix to supported Node versions so PR validation aligns with current dependency engine requirements.

• Workflow matrix update

  • Changed .github/workflows/node.js.yml Node matrix from 16.x, 18.x, 20.x to 18.x, 20.x, 22.x.
  • Keeps multi-version coverage while dropping the unsupported legacy runtime.

• Why this resolves the failure

  • Removes the failing build (16.x) lane that no longer satisfies package engine constraints.
  • Preserves current-stable coverage and adds forward coverage on Node 22.

strategy:
  matrix:
    node-version: [18.x, 20.x, 22.x]