helm-docker/renovate.json

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "automerge": true,
  "automergeStrategy": "merge-commit",
  "automergeType": "pr",
  "rebaseLabel": "renovate/rebase",
  "rebaseWhen": "behind-base-branch",
  "regexManagers": [
    {
      "fileMatch": [
        "^Makefile$"
      ],
      "matchStrings": [
        "HELM_VERSION?=(?<currentValue>.*)"
      ],
      "datasourceTemplate": "github-releases",
      "depNameTemplate": "helm/helm",
      "versioningTemplate": "semver"
    }
  ]
}