Problem: changelog not updated (#624)

Solution: added an entry for the latest testnet binaries

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+*August 13, 2021*
+
+## v3.0.0-croeseid
+This version is meant for the future testnet. It is based on IBC 1.0 and Cosmos SDK 0.43.0 which 
+contain several new features (such as the feegrant and authz modules), bug fixes (such as the vesting account bug fix)
+and breaking changes. For more details, please see the [Cosmos SDK](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.43.0)
+and [ibc-go](https://github.com/cosmos/ibc-go/releases/tag/v1.0.0) release notes.
+*WARNING*: DO NOT upgrade to this binary on the existing testnets yet; instructions are going to be published later
+on https://crypto.org/docs/getting-started/.
+
 *August 6, 2021*
 
 ## v2.1.2