message: updated changelog: removed milestone info
diff: @@ -6,7 +6,6 @@ The changelog format is based on [Keep a Changelog](https://keepachangelog.com/e
  ## 2.0.3 - 25-Oct-2022
  -**Milestone**: Symbol Mainnet
  Package | Version | Link
  ---|---|---
  SDK Core| v2.0.3 | [symbol-sdk](https://www.npmjs.com/package/symbol-sdk)
  