fix sample bookinfo yaml

Created by: zackzhangkai

Signed-off-by: zackzhangkai zackzhang@yunify.com

What type of PR is this?

/kind documentation

What this PR does / why we need it:

There are some errors when apply this yaml.

error: error validating "STDIN": error validating data: ValidationError(Deployment.spec.template.spec.containers[0].ports[0]): unknown field "servicePort" in io.k8s.api.core.v1.ContainerPort; if you choose to ignore these errors, turn validation off with --validate=false