add 2.3.6 changelog

Author: NMGuner

CHANGELOG.md

@@ -5,6 +5,9 @@ All notable changes to this project will be documented in this file.
 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).
 
+## [2.3.6] - 2024-08-06
+- Updated Android native SDK version to 2.6.19
+
 ## [2.3.5] - 2024-07-04
 - Fixed SDK dialogs with using activity as context for KlarnaStandaloneWebView.