Changelog update

Author: al-af

CHANGELOG.md

@@ -2,6 +2,7 @@
 Release date: *2025-02-23*
 
 ### Android
+- Updated Android minimum SDK version to 21.
 - Updated Gradle to 8.2.0 in demo app for testing and added `namespace` in `android/build.gradle` ([#583](https://github.com/AppsFlyerSDK/appsflyer-react-native-plugin/issues/583), [#561](https://github.com/AppsFlyerSDK/appsflyer-react-native-plugin/issues/561)).
 - Updated Expo documentation with `customAndroidManifest` to overcome build failure with React Native 0.76 & Expo 52 ([#586](https://github.com/AppsFlyerSDK/appsflyer-react-native-plugin/issues/586#issuecomment-2520223121)).
 - Fixed typo in UDL type definition ([#575](https://github.com/AppsFlyerSDK/appsflyer-react-native-plugin/issues/575)).