patch https://api.sandbox.salsa.dev/api/rest/v1/employers//workers//contracts/
Updates a WorkerContract for a given Worker. WorkerContract's can only be updated if they have not been used in a payroll run. However, the endDate of a workerContract that has been used can be updated provided that the endDate is after the startDate of the payPeriod of the latest PayrollRun for the worker.