add changelog

CHANGELOG.md

@@ -7,12 +7,13 @@
 - [cronos#728](https://github.com/crypto-org-chain/cronos/pull/728) Upgrade gravity bridge latest bugfix, including multi attestation processing and double spend check. 
 - [cronos#742](https://github.com/crypto-org-chain/cronos/pull/742) Add upgrade handler for v0.8.0-gravity-alpha2.
 - [cronos#750](https://github.com/crypto-org-chain/cronos/pull/750) Add upgrade handler for v0.8.0-gravity-alpha3.
+- [cronos#750](https://github.com/crypto-org-chain/cronos/pull/750) Add upgrade handler for v0.8.0-gravity-alpha3.
 
 ### Improvements
 
 - [cronos#702](https://github.com/crypto-org-chain/cronos/pull/702) Integrate the file state streamer.
 - [cronos#714](https://github.com/crypto-org-chain/cronos/pull/714) Add option `iavl-disable-fastnode` to disable iavl fastnode indexing migration.
-- [cronos#729](https://github.com/crypto-org-chain/cronos/pull/729) Update dependencies to recent versions.
+- [cronos#769](https://github.com/crypto-org-chain/cronos/pull/769) Prevent cancellation function to be called outside the scope of the contract that manage it.
 
 *September 13, 2022*