message: root: Update CHANGELOG for logs refactor
diff: # CHANGELOG
  +## 0.24.0 (unreleased)
  +
  +- @cosmjs/cosmwasm: `logs` is no longer exported. Use `logs` from
  + @cosmjs/launchpad instead.
  +
  ## 0.23.1 (2020-10-27)
  - @cosmjs/crypto: Export new convenience functions `keccak256`, `ripemd160`,
  