GitHub Action: update runs.using from node20 to node24

[yonda]

Is your feature request related to a problem? Please describe.

GitHub Actions is deprecating the Node.js 20 runtime. Node24 will become the default on June 2, 2026, and node20 will be removed in fall 2026.

https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The action.yml on master currently specifies runs.using: node20, which will stop working after node20 removal.

Describe the solution you'd like

Update action.yml to runs.using: node24.

Reference: #2712 / #2719 (same transition from node16 to node20)

Describe alternatives you've considered

N/A

Additional context

N/A