New `update_email_domain` mutation

In API versions 2025-01 and later, you can update a user's email domain through the API using the new update_email_domain mutation!

mutation {
  update_email_domain (input: {new_domain: "[email protected]", user_ids: [123456, 654321]}) {
    updated_users {
      name
      is_admin
    }
    errors {
      user_id
      code
      message
    }
  }
}