fix: use name of interface instead of relying on idx - #458

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: canonical/has-signed-canonical-cla@19bae73390fdbfdc1ef9a9bb9408d87a1de755f6. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/