message: Update CHANGELOG for custom broadcast timing
diff: @@ -8,6 +8,8 @@ and this project adheres to
  ### Added
  +- @cosmjs/cosmwasm-stargate: Add `broadcastTimeoutMs` and
  + `broadcastPollIntervalMs` options added to `SigningCosmWasmClientOptions`.
  - @cosmjs/proto-signing: Add `serialize` and `serializeWithEncryptionKey`
  methods to `DirectSecp256k1HdWallet`. Also add `deserialize` and
  `deserializeWithEncryptionKey` static methods.
  @@ -15,6 +17,8 @@ and this project adheres to
  helper functions and `KdfConfiguration` type.
  - @cosmjs/proto-signing: Export `makeCosmoshubPath` helper.
  - @cosmjs/stargate: Export `makeCosmoshubPath` helper.
  +- @cosmjs/stargate: Add `broadcastTimeoutMs` and `broadcastPollIntervalMs`
  + options added to `SigningStargateClientOptions`.
  ## [0.25.1] - 2021-05-06
  