Ukrainian Prime Minister Yulia Svyrydenko stepped down on Sunday as President Volodymyr Zelensky announced fresh changes to Ukraine’s government, saying he had offered a new and important position to the former premier. Zelensky, who has remained in office under martial law because wartime elections are prohibited, has periodically reshuffled his government in an effort to bring fresh momentum to his administration. Svyrydenko, who has served as Ukraine’s economy minister, was named prime...