Merge pull request kubernetes#83121 from sftim/20190925_fix_apiserver_help_readyz_typo

Fix typo in API server help for shutdown-delay-duration

Author: k8s-ci-robot

staging/src/k8s.io/apiserver/pkg/server/options/server_run_options.go

@@ -215,7 +215,7 @@ func (s *ServerRunOptions) AddUniversalFlags(fs *pflag.FlagSet) {
 
 	fs.DurationVar(&s.ShutdownDelayDuration, "shutdown-delay-duration", s.ShutdownDelayDuration, ""+
 		"Time to delay the termination. During that time the server keeps serving requests normally and /healthz "+
-		"returns success, but /readzy immediately returns failure. Graceful termination starts after this delay "+
+		"returns success, but /readyz immediately returns failure. Graceful termination starts after this delay "+
 		"has elapsed. This can be used to allow load balancer to stop sending traffic to this server.")
 
 	utilfeature.DefaultMutableFeatureGate.AddFlag(fs)