Bump golang.org/x/net from 0.30.0 to 0.31.0 #2466

Job	Run time
Unit Test (knative/serving)	9m 43s
Unit Test (knative/networking)	4m 2s
Unit Test (knative/eventing)	12m 9s
Unit Test (knative/operator)	7m 15s
Unit Test (knative/client)	6m 15s
Unit Test (knative-extensions/eventing-autoscaler-keda)	4m 55s
Unit Test (knative-extensions/eventing-ceph)	5m 11s
Unit Test (knative-extensions/eventing-github)	5m 39s
Unit Test (knative-extensions/eventing-gitlab)	5m 16s
Unit Test (knative-extensions/eventing-kafka-broker)	9m 28s
Unit Test (knative-extensions/eventing-rabbitmq)	8m 11s
Unit Test (knative-extensions/eventing-redis)	5m 18s
Unit Test (knative-extensions/kn-plugin-admin)	4m 43s
Unit Test (knative-extensions/net-certmanager)	4m 46s
Unit Test (knative-extensions/net-contour)	5m 0s
Unit Test (knative-extensions/net-istio)	5m 9s
Unit Test (knative-extensions/net-kourier)	4m 47s
	1h 47m 47s

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