Added latest update to the top of the changelog file

Author: JosiasMB

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).
 
+### Added
+- Add missing `originalStartTime` field to `Event` model for recurring event instances
+  
 ## [8.0.0] - 2025-12-12
 
 ### Added
@@ -803,6 +806,3 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 - **BREAKING**: `DeltaStream` now also supports `view=expanded`, `exclude_types`, and `include_types`, as well as any arbitrary query string param. `Delta::startStream` now takes an object as a second argument for query string params, instead of an `exclude_types` array
-
-### Added
-- Add missing `originalStartTime` field to `Event` model for recurring event instances