update changelog for v7.0.3 (osmosis-labs#1025)

* update changelog for v7.0.3

CHANGELOG.md

@@ -41,8 +41,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [v7.0.3](https://github.com/osmosis-labs/osmosis/releases/tag/v7.0.3)
+
 ### Minor improvements & Bug Fixes
 
+* [#1022](https://github.com/osmosis-labs/osmosis/pull/1022) upgrade iavl to v0.17.3-osmo-v4 - fix state export at an old height
+* [#988](https://github.com/osmosis-labs/osmosis/pull/988) Make `SuperfluidUndelegationsByDelegator` query also return synthetic locks 
 * [#984](https://github.com/osmosis-labs/osmosis/pull/984) Add wasm support to Dockerfile
 
 ## [v7.0.2 - Carbon](https://github.com/osmosis-labs/osmosis/releases/tag/v7.0.2)