docs(picker-legacy): update breaking changes

Author: thetaPC

BREAKING.md

@@ -24,6 +24,8 @@ This is a comprehensive list of the breaking changes introduced in the major ver
 
 - `ion-picker-legacy` and `ion-picker-legacy-column` have been removed. The legacy picker component has been replaced with an inline picker component.
    - Usages such as `ion-picker-legacy` or `IonPickerLegacy` should be changed to `ion-picker` and `IonPicker`, respectively.
+- Remove any usages of `pickerController`. If using React, remove any usages of the `useIonPicker` hook. These controller-based APIs have been removed. Use the inline picker component instead.
+- Remove any usages of the `PickerOptions`, `PickerButton`, `PickerColumn`, and `PickerColumnOption` type exports. These types were associated with the legacy picker and have been removed.
 
 <h4 id="version-9x-router-outlet">Router Outlet</h4>