By Pavel Polityuk KYIV (Reuters) -NATO allies promised more arms for Ukraine and equipment to help restore power supplies cut by Russian strikes, as President Volodymyr Zelenskiy said his forces were defending against attempted Russian advances in multiple regions. Ukraine’s General Staff said on Wednesday its forces had repelled six Russian attacks in the past 24 hours in the eastern Donbas region, while Russian artillery had relentlessly shelled the right bank of the Dnipro River and Kherson city further south. Ukrainians on Tuesday fled for bomb shelters after air-raid warning sirens, altho…