Update CHANGELOG

Author: shepherd-l

OneSignalExample/Assets/OneSignal/CHANGELOG.md

@@ -5,6 +5,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Updated included iOS SDK from 3.12.9 to [3.12.10](https://github.com/OneSignal/OneSignal-iOS-SDK/releases/tag/3.12.10)
+  - Replace deprecated openURL method preventing launch URLs
+  - Update privacy manifest User Defaults API reason to include app groups
+  - For full changes, [see the native release notes](https://github.com/OneSignal/OneSignal-iOS-SDK/releases)
+
 ## [3.0.12]
 ### Changed
 - Updated included Android SDK from 4.8.5 to [4.8.8](https://github.com/OneSignal/OneSignal-Android-SDK/releases/tag/4.8.8)