Adding a note to the changelog

CHANGELOG.md

@@ -7,18 +7,15 @@
 * None
 
 ### Fixed
-* <How to hit and notice issue? what was the impact?> ([#????](https://github.com/realm/realm-js/issues/????), since v?.?.?)
-* None
+* Fixed compiler error when building binding for React Native iOS: "'React-featureflags/react/featureflags/ReactNativeFeatureFlags.h' file not found" ([#6808](https://github.com/realm/realm-js/issues/6808), since v12.12.0)
 
 ### Compatibility
 * React Native >= v0.71.4
 * Realm Studio v15.0.0.
 * File format: generates Realms with format v24 (reads and upgrades file format v10).
 
 ### Internal
-<!-- * Either mention core version or upgrade -->
-<!-- * Using Realm Core vX.Y.Z -->
-<!-- * Upgraded Realm Core from vX.Y.Z to vA.B.C -->
+* Removed an unused import in the binding for React Native Android. ([#6808](https://github.com/realm/realm-js/issues/6808), since v12.12.0)
 
 ## 12.12.0 (2024-07-23)