message: Update CHANGELOG with items from 0.9.3
  Seems like we've been forgetting to update the CHANGELOG in our PR's. We might want to create a pull request template to remind us to do things like changelog and crate version bumps.
diff: # Release Notes
  -## Platform Version 0.9.3 - UNRELEASED
  -* Fixs Replication timing. ([#1439](https://github.com/infinyon/fluvio/pull/1439))
  +## Platform Version 0.9.3 - 2021-08-19
  +* Fix Replication timing. ([#1439](https://github.com/infinyon/fluvio/pull/1439))
  +* Fix release workflow to include Helm charts ([#1361](https://github.com/infinyon/fluvio/issues/1361))
  +* Implement SmartStream Aggregates (`#[smartstream(aggregate)]`) API ([#1173](https://github.com/infinyon/fluvio/issues/1173))
  +* Fix bounds when resolving relative Offsets ([#1210](https://github.com/infinyon/fluvio/issues/1210))
  +* Add `--tail` CLI option for reading recent records from a stream ([#1216](https://github.com/infinyon/fluvio/issues/1210))
  +* Fix consumer stream API that waited for records before initializing ([#986](https://github.com/infinyon/fluvio/issues/986))
  ## Platform Version 0.9.2 - 2021-08-10
  * Make Cluster installation more reliable. ([#1395](https://github.com/infinyon/fluvio/pull/1395))
  