Add native -exclude to buildifier - #1486

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: step-security/harden-runner@95d9a5deda9de15063e7595e9719c11c38c90ae2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/