Configuring Renovate To Use PAH for Galaxy Dependencies

Just a gist, since I tend to forget things.

PR to allow custom registries: https://github.com/renovatebot/renovate/issues/14799
PR to make it work with the Private Automation Hub: https://github.com/renovatebot/renovate/pull/25675

  "packageRules": [
    ...
    {
      "matchDatasources": ["galaxy-collection"],
      "registryUrls": [
        "https://automation-hub.apps.ocp4.example.com/api/galaxy/content/rh-certified/",
        "https://automation-hub.apps.ocp4.example.com/api/galaxy/content/validated/",
        "https://automation-hub.apps.ocp4.example.com/api/galaxy/content/community/"
      ]
    }
  ],
  ...