fix: drop remaining feature_flags/rotation leftovers - #35

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

Landlock ABI 10 or later is required to deny all network access; found ABI 7. Applying the network restrictions supported by this kernel.