Update snapshot storage error message
Update snapshot storage error message

Signed-off-by: Daniel Nephin <6347c07ae509164cffebfb1e2a0d6ed64958db19@gmail.com>

miaoyq/containerd,estesp/containerd,kunalkushwaha/containerd,thaJeztah/containerd,crosbymichael/containerd,thaJeztah/containerd,mikebrow/containerd,containerd/containerd,miaoyq/containerd,mikebrow/containerd,dmcgowan/containerd,crosbymichael/containerd,kunalkushwaha/containerd,dmcgowan/containerd,vdemeester/containerd,containerd/containerd,vdemeester/containerd,estesp/containerd