Update CHANGELOG.md

Author: YogendraShelke

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- We updated to React Native v0.84.1 and replaced deprecated APIs with modern equivalents.
+
 ## [v0.4.1] - 2026-04-22
 
 - We strengthened Android cookie encryption by migrating from `AES/CBC/PKCS7Padding` to `AES/GCM/NoPadding`.