fix: make CLI messages name flags that exist and causes users can act on - #77

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, actions/setup-python@v5, stefanzweifel/git-auto-commit-action@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The `python-version` input is not set. The version of Python currently in `PATH` will be used.