fix(block): punch holes for freed qcow2 clusters - #2

Unable to resolve action `homebrew/actions@master`, unable to find version `master`

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/