cmd/dist: consistently replace version string
cmd/dist: consistently replace version string

A previous PR placed the version string replacement in the `init`
function in the other commands. This makes this same change consistently
in the `dist` tool.

Signed-off-by: Stephen J Day <63efd86fa22882ae89b6027b22a36e4db1f4214d@docker.com>

mikebrow/containerd,rajasec/containerd,xiekeyang/containerd,kunalkushwaha/containerd,docker/containerd,containerd/containerd,thaJeztah/containerd,yuexiao-wang/containerd,vdemeester/containerd,chanezon/containerd,estesp/containerd,estesp/containerd,dmcgowan/containerd,dmcgowan/containerd,AkihiroSuda/containerd,miaoyq/containerd,crosbymichael/containerd,crosbymichael/containerd,kunalkushwaha/containerd,hqhq/containerd,mikebrow/containerd,containerd/containerd,vdemeester/containerd,miaoyq/containerd,lichao-mobanche/containerd,Wolphin-project/containerd,thaJeztah/containerd