zh: sync /about/feature-stages/ (#2768)
zh: sync /about/feature-stages/ (#2768)


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