fix changelog

Author: Pavel Yakimenko

CHANGELOG.md

@@ -542,6 +542,7 @@ The prebuilt binary for Carthage is now build with Xcode 14.0.1.
 * <How to hit and notice issue? what was the impact?> ([#????](https://github.com/realm/realm-swift/issues/????), since v?.?.?)
 * None.
 * Copy EmbeddedObject for embedded object property on initializing unmanaged object ([#6921](https://github.com/realm/realm-cocoa/issues/6921)
+* Copying an embedded object to an unmanaged object will not throw ([#6921](https://github.com/realm/realm-cocoa/issues/6921)
 
 ### Breaking Changes