message: Update CHANGELOG for 0.25.5
diff: @@ -6,6 +6,8 @@ and this project adheres to
  ## [Unreleased]
  +## [0.25.5] - 2021-06-23
  +
  ### Added
  - @cosmjs/tendermint-rpc: `Tendermint34Client.blockSearch` and
  @@ -491,6 +493,7 @@ CHANGELOG entries missing. Please see [the diff][0.24.1].
  - @cosmjs/sdk38: Rename package to @cosmjs/launchpad.
  [unreleased]: https://github.com/cosmos/cosmjs/compare/v0.25.3...HEAD
  +[0.25.5]: https://github.com/cosmos/cosmjs/compare/v0.25.4...v0.25.5
  [0.25.4]: https://github.com/cosmos/cosmjs/compare/v0.25.3...v0.25.4
  [0.25.3]: https://github.com/cosmos/cosmjs/compare/v0.25.2...v0.25.3
  [0.25.2]: https://github.com/cosmos/cosmjs/compare/v0.25.1...v0.25.2
  