[Automated] Update eventing-istio-eventing-kafka-broker nightly

[knative-automation]

/assign @knative-extensions/eventing-wg-leads
/cc @knative-extensions/eventing-wg-leads

Produced via:

for x in eventing-kafka-broker.yaml eventing-kafka-controller.yaml eventing-kafka-source.yaml eventing-kafka-channel.yaml eventing-kafka-sink.yaml; do
  curl https://storage.googleapis.com/knative-nightly/eventing-kafka-broker/latest/$x > ${GITHUB_WORKSPACE}/./third_party/eventing-kafka-broker-latest/$x
done

Details:

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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