This updates the k8s.io/util to pull in the fix for
https://github.com/kubernetes/kubernetes/issues/104452.
Commands run:
./hack/pin-dependency.sh k8s.io/utils v0.0.0-20210819203725-bdf08cb9a70a
./hack/update-vendor.sh
Kubernetes-commit: c2532351525c2822daab61303eb4f94942a017e6