message: Add links to changelog
  Add PR links to changelog
diff: ## Unreleased
  ## Platform Version 0.7.4 - 2020-04-22
  -* Added Partitioner trait for assigning partitions based on record keys (#965)
  -* Deprecated the `TopicProducer::send_record` method (#965)
  -* Decoupled Fluvio CLI from Fluvio server components (#928)
  +* Added Partitioner trait for assigning partitions based on record keys ([#965](https://github.com/infinyon/fluvio/pull/965))
  +* Deprecated the `TopicProducer::send_record` method ([#965](https://github.com/infinyon/fluvio/pull/965))
  +* Decoupled Fluvio CLI from Fluvio server components ([#928](https://github.com/infinyon/fluvio/pull/928))
  ## Platform Version 0.7.3 - 2020-04-02
  * Added batching for producing records with `send_all` API ([#896](https://github.com/infinyon/fluvio/pull/896)).
  