Updated changelog message

Author: alwx

CHANGELOG.md

@@ -8,6 +8,10 @@
 
 ## Unreleased
 
+### Fixes
+
+- Fix the issue with changing immutable metadata structure in the contructor of `ReactNativeClient`. This structure is getting re-created instead of being modified to ensure IP address is only inferred by Relay if `sendDefaultPii` is `true`.
+
 ### Dependencies
 
 - Bump Cocoa SDK from v8.56.1 to v8.56.2 ([#5214](https://github.com/getsentry/sentry-react-native/pull/5214))