chore: update CHANGELOG.md

Author: andredestro

CHANGELOG.md

@@ -4,6 +4,12 @@ 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).
 
+## [Unreleased]
+
+### Features
+
+- Add support for passing custom headers to `WKWebView` (only for the openInWebView option). [RMET-4287](https://outsystemsrd.atlassian.net/browse/RMET-4287).
+
 ## 2.0.1
 
 ### Features