Updated changelog message

Author: alwx

CHANGELOG.md

@@ -15,6 +15,7 @@
 ### Fixes
 
 - Fixes .env file loading in Expo sourcemap uploads ([#5210](https://github.com/getsentry/sentry-react-native/pull/5210))
+- Fixes 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