deps(go): bump sigs.k8s.io/structured-merge-diff/v4 from 4.4.1 to 4.4.3 in the k8s group across 1 directory

deps(go): bump sigs.k8s.io/structured-merge-diff/v4 from 4.4.1 to 4.4.3 in the k8s group across 1 directory #1446