Update CHANGELOG.md

Author: keveleigh

org.mixedrealitytoolkit.input/CHANGELOG.md

@@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 ### Fixed
 
 * Fixed `EyeCalibrationChecker` build issue on UWP when the Mixed Reality OpenXR Plugin wasn't installed. [PR #1106](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1106)
+* Fixed `MRTKHandsAggregatorSubsystem` not reusing local structs that it claimed to be reusing, which was causing a build warning. [PR #1072](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1072)
 
 ## [3.3.0] - 2025-11-12