Create a new wiki page to agree how often we do pre-commit updates

Pre-commit hooks should be periodically updated to the latest versions using `pre-commit autoupdate`. See: [Updating Hooks Automatically](https://pre-commit.com/#updating-hooks-automatically).

Working practices could be agreed and documented to handle this.

Start with the issue's linked "Updating Hooks Automatically" guidance and the `pre-commit autoupdate` command. Agree on a practical update cadence and document the resulting working practice in a new wiki page; done means the page records how often pre-commit hooks should be updated and how to perform the update.

Written by the indexing model from the issue text.