Bump google.golang.org/api from 0.138.0 to 0.139.0 #2069

Job	Run time
Unit Test (knative/serving)	15m 8s
Unit Test (knative/networking)	8m 32s
Unit Test (knative/eventing)	24m 12s
Unit Test (knative/operator)	9m 40s
Unit Test (knative/client)	10m 52s
Unit Test (knative-extensions/eventing-autoscaler-keda)	8m 4s
Unit Test (knative-extensions/eventing-ceph)	8m 5s
Unit Test (knative-extensions/eventing-github)	9m 0s
Unit Test (knative-extensions/eventing-gitlab)	9m 34s
Unit Test (knative-extensions/eventing-kafka)	13m 42s
Unit Test (knative-extensions/eventing-kafka-broker)	20m 7s
Unit Test (knative-extensions/eventing-rabbitmq)	18m 23s
Unit Test (knative-extensions/eventing-redis)	9m 0s
Unit Test (knative-extensions/kn-plugin-admin)	7m 6s
Unit Test (knative-extensions/net-certmanager)	6m 47s
Unit Test (knative-extensions/net-contour)	8m 29s
Unit Test (knative-extensions/net-http01)	6m 19s
Unit Test (knative-extensions/net-istio)	9m 26s
Unit Test (knative-extensions/net-kourier)	8m 52s
	3h 31m 18s

Provide feedback