Updated CHANGELOG

Author: sadortun

CHANGELOG.md

@@ -114,6 +114,7 @@ ___
 - Added Deprecation Policy to govern the introduction of breaking changes in a phased pattern that is more predictable for developers (Manuel Trezza) [#7199](https://github.com/parse-community/parse-server/pull/7199)
 - Add REST API endpoint `/loginAs` to create session of any user with master key; allows to impersonate another user. (GormanFletcher) [#7406](https://github.com/parse-community/parse-server/pull/7406)
 - Add official support for MongoDB 5.0 (Manuel Trezza) [#7469](https://github.com/parse-community/parse-server/pull/7469)
+- Add user-defined schema and migrations (Antoine Cormouls, Samuel Denis-D'Ortun) [#7418](https://github.com/parse-community/parse-server/pull/7418)
 
 ### Other Changes
 - Support native mongodb syntax in aggregation pipelines (Raschid JF Rafeally) [#7339](https://github.com/parse-community/parse-server/pull/7339)