Liberal leadership contender Mark Carney is expected to announce on Wednesday that if he becomes prime minister he’s committed to reaching NATO’s military investment benchmark of two per cent of gross domestic product by the end of 2030, CBC News has learned.Carney’s commitment to defence spending is somewhat more ambitious than the government’s official timeline of 2032, but not the defence minister’s goal of 2027. The former central banker’s promise to the military is one of the changes Carney is proposing in his speech at the Gordie Howe International Bridge in Windsor just days after U.S. President Donald Trump agreed to pause…