You should be redirected automatically to target URL: https://repo.ito.gov.ir/kubernetes/yum/repos/kubernetes-el7-aarch64/Packages/ecb2f8c6648c0fb11a51047c91cde8a6a3a3c1cda29c5c9cd76ee2c52493543e-kubeadm-1.18.6-0.aarch64.rpm. If not click the link.