I use renovate as App on GitHub and it successfully updates my package.json.

I would like to have a similar feature for the action files themselves under
.github/workflows

For example a step

steps:
 - uses: actions/checkout@v3

should be updated to use current version of action:

steps:
- uses: actions/checkout@v4

=> Is renovate able to do so?

If yes: how to get it working/how to configure correctly to do so?

If no: is there another tool for it? Or do I need to do this manually?
(Then I exchanged manual update of package.json with manual update of *.yml)

At

https://docs.renovatebot.com/modules/manager/github-actions/

It states

“Renovate supports updating Github Actions dependencies.”

but I do not understand how to activate it.

Related:

Using the latest version of a GitHub Action

https://github.com/renovatebot/renovate/discussions/28625