message: Update CHANGELOG for SigningCosmWasmClient.sign
diff: @@ -41,7 +41,11 @@ and this project adheres to
  - @cosmjs/stargate: Add `SigningStargateClient.sign`, which allows you to create
  signed transactions without broadcasting them directly. The new type
  `SignerData` can be passed into `.sign` to skip querying account number,
  - sequence and chain ID.
  + sequence and chain ID
  +- @cosmjs/cosmwasm-stargate: Add `SigningCosmWasmClient.sign`, which allows you
  + to create signed transactions without broadcasting them directly. The new type
  + `SignerData` from @cosmjs/stargate can be passed into `.sign` to skip querying
  + account number, sequence and chain ID.
  - @cosmjs/stargate: Add constructor `SigningStargateClient.offline` which does
  not connect to Tendermint. This allows offline signing.
  - @cosmjs/stargate: Add `makeMultisignedTx` which allows you to assemble a
  