fix: renovate bot should only run on gitlab.com

mentioned in merge request !115 (merged)

mentioned in merge request gitlab-org/release-tools!1862 (merged)

mentioned in merge request cmbr!44 (merged)

mentioned in merge request terra-transformer!52 (merged)

mentioned in merge request pmv!67 (merged)

mentioned in merge request bigquery-loader!29 (merged)

mentioned in merge request asdf-gl-infra!5 (merged)

mentioned in merge request asdf-thanos!16 (merged)

mentioned in merge request gitlab-com/runbooks!4672 (merged)

mentioned in merge request common-template-copier!3 (closed)

mentioned in merge request asdf-promtool!10 (merged)