The `renovate-bot` user must also be added to the repo to make this work.
(For automated onboarding, the user could also be added to the `gitea` org and given write permissions to all repos)
Reviewed-on: https://gitea.com/gitea/homebrew-gitea/pulls/180
Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>
pat-s