Currently the version of actions/runner is defined at below:
It would be nice to update the version automatically using Renovate.
I think we can use GitHub Releases datasource from https://github.com/actions/runner/releases.
I'm investigating Renovate config at https://github.com/int128/actions-runner-controller/blob/master/.github/renovate.json5.
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I'm investigating Renovate config at https://github.com/int128/actions-runner-controller/blob/master/.github/renovate.json5.