Changes to Update a repeating send

removed the invalid_signup_code enum value from the error/code response property for the response status 400

removed the invalid_signup_code enum value from the error/code response property for the response status 401

removed the invalid_signup_code enum value from the error/code response property for the response status 404

the every_minutes request property's min was decreased from 5.00 to 1.00

endpoint added