Changes to Update a group

added the new optional request property metadata

added the enum value metadata to the property items/ of the query request parameter fields

added the optional property metadata to the response with the 200 status

added the new PAY_GROUP enum value to the type response property for the response status 200

added the new optional request property next_paid_at

added the new optional request property pay_frequency

added the enum value next_paid_at to the property items/ of the query request parameter fields

added the enum value pay_frequency to the property items/ of the query request parameter fields

added the new PAY_GROUP enum value to the request property type

added the optional property next_paid_at to the response with the 200 status

added the optional property pay_frequency to the response with the 200 status