Update apiVersions of webhook rule #2415

Job	Run time
cleanup	3s
changed-policy	12s
changed-viz	14s
tag	7s
changed-multicluster	11s
build-cli	5m 5s
build-ext (jaeger-webhook)	4m 26s
build-ext (metrics-api)	4m 6s
build-ext (tap)	4m 31s
build-ext (web)	6m 2s
build-core (cni-plugin)	3m 59s
build-core (controller)	4m 39s
build-core (policy-controller)	12m 40s
build-core (proxy)	3m 33s
test-core (cni-calico-deep)	6m 24s
test-core (deep)	6m 30s
test-policy (v1.21)	9m 38s
test-policy (v1.26)	9m 21s
test-viz	0s
test-ext (cluster-domain)	5m 46s
test-ext (default-policy-deny)	5m 44s
test-ext (external)	6m 56s
test-ext (rsa-ca)	3m 50s
test-ext (helm-upgrade)	6m 8s
test-ext (uninstall)	5m 36s
test-ext (upgrade-edge)	7m 28s
test-ext (upgrade-stable)	6m 10s
test-multicluster	0s
	2h 9m 19s

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