Automatically update release version for pre-commit hooks config with Renovate

[linakrisztian]

For the config of the pre-commit hooks the latest version of the github-workflows should be used.

This should be doable with Renovate, but has to be configured: Renovate currently has the ability to update .pre-commit-config.yaml if the behaviour is opted into (from renovatebot/renovate#20780)

See also: https://github.com/adam-moss/renovate-20780/blob/main/renovate.yaml#L33-L43

[mmacata]

It works! Tested with https://github.com/mundialis/v.example where after the change, renovate suggested a version update for this pre-commit hook.
How-to added to README

[mmacata]

(Now this can be used for all repositories using this while this one is left out 😬 )