fix(ci): ci-fresh-install had two defects, both firing after every release; bundle xlings 2026.8.4.1 - #350

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/