OffloadMigration: Fix -Wchanges-meaning errors from newer GCC - #1352

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38, actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8, aminya/setup-cpp@17c11551771948abc5752bbf3183482567c7caf0, step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/