etcd arch can support arm64 and amd64 (#9421)

docs/offline-environment.md

@@ -23,7 +23,7 @@ kubeadm_download_url: "{{ files_repo }}/kubernetes/{{ kube_version }}/kubeadm"
 kubectl_download_url: "{{ files_repo }}/kubernetes/{{ kube_version }}/kubectl"
 kubelet_download_url: "{{ files_repo }}/kubernetes/{{ kube_version }}/kubelet"
 # etcd is optional if you **DON'T** use etcd_deployment=host
-etcd_download_url: "{{ files_repo }}/kubernetes/etcd/etcd-{{ etcd_version }}-linux-amd64.tar.gz"
+etcd_download_url: "{{ files_repo }}/kubernetes/etcd/etcd-{{ etcd_version }}-linux-{{ image_arch }}.tar.gz"
 cni_download_url: "{{ files_repo }}/kubernetes/cni/cni-plugins-linux-{{ image_arch }}-{{ cni_version }}.tgz"
 crictl_download_url: "{{ files_repo }}/kubernetes/cri-tools/crictl-{{ crictl_version }}-{{ ansible_system | lower }}-{{ image_arch }}.tar.gz"
 # If using Calico