packit/prepare-release

GitHub Action to prepare a new release, which includes:

• generate a new changelog entry in CHANGELOG.md
• update the version in the specfile
• update %changelog in the specfile

Inputs:

• version: version string to be used in for the release
• specfiles: comma separated paths of the specfiles to be updated
• token: a repo scoped Personal Access Token (PAT); defaults to GITHUB_TOKEN secret if missing