Add CHANGELOG entry

Author: webmaster128

CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to
   price from the chain. ([#1926])
 - @cosmjs/cosmwasm-stargate: Add the ability to specify a custom account parser
   for `CosmWasmClient`. ([#1928])
+- Add initial support for Cosmos EVM signing
 
 [#1883]: https://github.com/cosmos/cosmjs/issues/1883
 [#1916]: https://github.com/cosmos/cosmjs/pull/1916