Documentation includes incorrect create-topic! calls

[lbradstreet]

(let [topic-name "customer-data-to-sell-to-advertisers"
      partition-count 42 ;;obviously]
(create-topic! topic-name partition-count))

(let [topic-name "customer-data-to-sell-to-advertisers"
      partition-count 42 ;;obviously
      replication-factor 3 ;;tri-force of replicas
      topic-config         {;;cover tracks
                           :cleanup.policy      :delete
                           ;;24 hours to abuse user trust
                           :delete.retention.ms 86400000
                           ;;fsync after every 10 messages, living dangerously
                           :flush.messages      10
                           ;;fsync on some nerdy interval
                           :flush.ms            32768}]
(create-topic! topic-name partition-count replication-factor topic-config))

Both create-topic!s should pass in zkutils as a first argument. This doc made me laugh pretty hard so I will forgive you. I'm not going to create a PR until you decide to un-drop the mic.