update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/sigs.k8s.io/controller-runtime/pkg/internal/flock/doc.go

@@ -0,0 +1,21 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package flock is copied from k8s.io/kubernetes/pkg/util/flock to avoid
+// importing k8s.io/kubernetes as a dependency.
+//
+// Provides file locking functionalities on unix systems.
+package flock