Fix the Unreleased section for workflow automations (#1010)

Author: joaodordio

CHANGELOG.md

@@ -2,7 +2,7 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
+## [Unreleased]
 - Replaced the deprecated `AsyncTask`-based push notification handling with `WorkManager` for improved reliability and compatibility with modern Android versions. No action is required.
 - Fixed lost event tracking and missed API calls with an auto-retry feature for JWT token failures.
 - Added `onEmbeddedMessagingSyncSucceeded()` and `onEmbeddedMessagingSyncFailed()` callbacks to `IterableEmbeddedUpdateHandler` for monitoring embedded message sync results.