chore(calendar-web): add changelog entry for showMultiDayTimes property

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: iobuhov

packages/pluggableWidgets/calendar-web/CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+### Added
+
+- We added a `showMultiDayTimes` property to control whether start/end times are displayed for multi-day events in the calendar.
+
 ## [2.4.0] - 2026-03-20
 
 ### Fixed