add goleak to kubelet vendor via hack/update-vendor.sh

Author: azych

staging/src/k8s.io/kubelet/go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/emicklei/go-restful/v3 v3.11.0
 	github.com/gogo/protobuf v1.3.2
 	github.com/stretchr/testify v1.10.0
+	go.uber.org/goleak v1.3.0
 	google.golang.org/grpc v1.68.1
 	k8s.io/api v0.0.0
 	k8s.io/apimachinery v0.0.0