Update menu after renaming cn -> zh
Update menu after renaming cn -> zh

geeknoid/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,linsun/istio.github.io,geeknoid/istio.github.io,geeknoid/istio.github.io,geeknoid/istio.github.io,istio/istio.io,linsun/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,linsun/istio.github.io