netcheck_etcd_image_tag should use dynamic value, current is v3.4.17

[kiddingbaby]

What would you like to be added

roles/kubespray-defaults/defaults/main/download.yml

etcd_supported_versions:
  v1.31: "v3.5.19"
  v1.30: "v3.5.19"
  v1.29: "v3.5.19"
etcd_version: "{{ etcd_supported_versions[kube_major_version] }}"
...
...
...
# netcheck_etcd_image_tag = v3.4.17
netcheck_etcd_image_tag = {{ etcd_image_tag }}

Why is this needed

There is not {{ netcheck_etcd_image_tag }} in contrib/offline/temp/images.list.template, it may occur pull image error in offline mode. Recommended to keep the version consistent with etcd,