fix sample RbacConfig in concept page. (#2253)
fix sample RbacConfig in concept page. (#2253)


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