message: Update CHANGELOG for 0.26.1
diff: @@ -6,6 +6,8 @@ and this project adheres to
  ## [Unreleased]
  +## [0.26.1] - 2021-09-30
  +
  ### Added
  - @cosmjs/amino: `decodeBech32Pubkey` and `decodeAminoPubkey` now support
  @@ -589,7 +591,8 @@ CHANGELOG entries missing. Please see [the diff][0.24.1].
  `FeeTable`. @cosmjs/cosmwasm has its own `FeeTable` with those properties.
  - @cosmjs/sdk38: Rename package to @cosmjs/launchpad.
  -[unreleased]: https://github.com/cosmos/cosmjs/compare/v0.26.0...HEAD
  +[unreleased]: https://github.com/cosmos/cosmjs/compare/v0.26.1...HEAD
  +[0.26.1]: https://github.com/cosmos/cosmjs/compare/v0.26.0...v0.26.1
  [0.26.0]: https://github.com/cosmos/cosmjs/compare/v0.25.6...v0.26.0
  [0.25.6]: https://github.com/cosmos/cosmjs/compare/v0.25.5...v0.25.6
  [0.25.5]: https://github.com/cosmos/cosmjs/compare/v0.25.4...v0.25.5
  