Previously, "errors" field was either an array of strings or an array of
error objects. This covers an additional case when "errors" is a string:

    $ gh api orgs/cli/actions/permissions/repositories
    {
      "message": "Conflict",
      "errors": "Actions are enabled for all repositories",
      "documentation_url": "https://docs.github.com/rest/reference/actions#list-selected-repositories-enabled-for-github-actions-in-an-organization"
    }