update dependencies

Signed-off-by: hongming <talonwan@yunify.com>

vendor/k8s.io/api/discovery/v1beta1/generated.proto

@@ -107,8 +107,9 @@ message EndpointPort {
   // This field follows standard Kubernetes label syntax.
   // Un-prefixed names are reserved for IANA standard service names (as per
   // RFC-6335 and http://www.iana.org/assignments/service-names).
-  // Non-standard protocols should use prefixed names.
-  // Default is empty string.
+  // Non-standard protocols should use prefixed names such as
+  // mycompany.com/my-custom-protocol.
+  // +optional
   optional string appProtocol = 4;
 }