Run black formatter with reviewdog

Version updated for reviewdog/action-black to version v3.9.1.

• This publisher is shown as ‘verified’ by GitHub.
• This action is used across all versions by 113 repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

v3.9.1: PR #64 - chore(deps): update actions/checkout action to v4

• reviewdog
• GitHub Actions