ci: Migrate from the defunct release-please app to release-please-action - #27

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: ytanikin/PRConventionalCommits@8d258b54939f6769fcd935a52b96d6b0383a00c5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/