actions 0.8.3

• Approve pending Actions workflow runs for post-release cleanup PRs, scoped to the current PR head SHA. (#234, @kelly-sovacool, @copilot)
• review-pre-commit-pr and review-post-release-pr: merge the validated commit directly, or explain why when auto-merge can't be enabled because the PR is already mergeable. (#239, @kelly-sovacool, @copilot)