ci: add pre-commit autoupdate ci job

[afuetterer]

Description

This PR proposes the following changes:

• add a pre-commit autoupdate ci job
• the job runs once a month or can be triggered manually
• the job calls pre-commit autoupdate and creates a PR with the updates in the PR body

Related issue: #777

• rebase

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Checklist

• I have read the contributor guide.
• My code follows the code style of this project.

[afuetterer]

Should I merge this in dev-2.0.2 instead?

[jochenklar]

ok.