SPRINGFIELD — House lawmakers have approved a bill allowing people to change the gender on their birth certificates without sex-reassignment surgery.House Bill 1785, sponsored by Rep. Greg Harris, would update the state’s Vital Records Act, which for decades has only allowed people to change the gender on their birth document if they have a physician’s affidavit showing they’ve had sex-change surgery.The measure is similar to one that was introduced last year, but never approved by the full chamber. …