The Harris campaign has altered its biography of Minnesota Gov. Tim Walz on its campaign website, making a change to a reference to his military service amid ongoing scrutiny of the 2024 Democratic vice presidential nominee’s military credentials.Walz’s biography initially said he was a “retired Command Sergeant Major.” It has since been updated to say that he “served as a command sergeant major.“Vice President Kamala Harris announced Walz as her running mate Tuesday, setting off a series of attacks over Walz’s background as Minnesota governor, a lawmaker and a member of the National Guard for nearly 25 years.VETERAN WHO SERVED IN TIM WALZ’S BATTALION ADDRESSES STOLEN VALOR ACCUSATIONS: ‘FAR DARKER THAN PEOPLE THINK’When Walz left the Guard, he had achieved the rank of command sergeant major, but he was reduced in ran …