message: Add release notes for BitGoJS 4.47.0
diff: # BitGoJS Release Notes
  +## 4.47.0
  +### New Features
  +- Add support for new ERC 20 Token (BAX)
  +- Allow passing custom unspent fetch parameters to `createTransaction`
  +- Handle missing optional Ethereum dependencies more gracefully
  +- Allow fetching of SegWit unspents for Ledger-backed wallets
  +
  +### Bug Fixes
  +- Specify exact versions of dependencies
  +- Update token contract hash for ERC20 Token (BID)
  +
  ## 4.46.0
  ### New Features
  - Add support for new ERC 20 Tokens (AMON, CRPT, AXPR, GOT, EURS)
  