deps: bump sigs.k8s.io/controller-runtime from 0.18.4 to 0.21.0#3814

dependabot[bot] wants to merge 1 commit intorelease/v1.6Azure/azure-container-networking:release/v1.6from

e9cadependabot/go_modules/release/v1.6/sigs.k8s.io/controller-runtime-0.21.0Azure/azure-container-networking:e9cadependabot/go_modules/release/v1.6/sigs.k8s.io/controller-runtime-0.21.0Copy head branch name to clipboard