Bump go.uber.org/atomic from 1.9.0 to 1.11.0 #1971

Job	Run time
Unit Test (knative/serving)	17m 54s
Unit Test (knative/networking)	9m 39s
Unit Test (knative/eventing)	22m 52s
Unit Test (knative/operator)	9m 25s
Unit Test (knative/client)	12m 43s
Unit Test (knative-sandbox/eventing-autoscaler-keda)	10m 12s
Unit Test (knative-sandbox/eventing-ceph)	8m 44s
Unit Test (knative-sandbox/eventing-github)	8m 34s
Unit Test (knative-sandbox/eventing-gitlab)	8m 35s
Unit Test (knative-sandbox/eventing-kafka)	13m 41s
Unit Test (knative-sandbox/eventing-kafka-broker)	17m 13s
Unit Test (knative-sandbox/eventing-rabbitmq)	17m 33s
Unit Test (knative-sandbox/eventing-redis)	12m 4s
Unit Test (knative-sandbox/kn-plugin-admin)	7m 2s
Unit Test (knative-sandbox/net-certmanager)	8m 11s
Unit Test (knative-sandbox/net-contour)	8m 2s
Unit Test (knative-sandbox/net-http01)	7m 42s
Unit Test (knative-sandbox/net-istio)	10m 25s
Unit Test (knative-sandbox/net-kourier)	8m 16s
	3h 38m 47s

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