Massachusetts health care officials said Friday they'll pay the lead contractor on the state's hobbled health insurance website an additional $35 million to close out the contract. That means the CGI Group, which has already been paid about $17 million, will end up receiving $52 million of an $89 million contract. Health care officials said the $35 million will compensate CGI Group and subcontractors for meeting certain milestones since November, when they were last paid. Officials said the agreement signed with CGI on Friday also allows the Massachusetts attorney general to recover up to $12 million, based on an ongoing false claims investigation.