message: Update CHANGELOG for cosmwasm-stargate default gas limits export
diff: @@ -49,6 +49,7 @@ and this project adheres to
  - @cosmjs/stargate: Add `delegateTokens`, `undelegateTokens` and
  `withdrawRewards` methods to `SigningStargateClient`.
  - @cosmjs/stargate: Export `defaultGasLimits` and `defaultGasPrice`.
  +- @cosmjs/cosmwasm-stargate: Export `defaultGasLimits`.
  ### Changed
  