Retain the git package after install to support plugins that need it - #216

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/

Unexpected input(s) 'install', valid inputs are ['version', 'driver', 'driver-opts', 'buildkitd-flags', 'buildkitd-config', 'buildkitd-config-inline', 'use', 'name', 'endpoint', 'platforms', 'append', 'keep-state', 'cache-binary', 'cleanup']