Add unreleased changelog entry for character count feature

Co-authored-by: gjulivan <[email protected]>

Author: Copilot

packages/pluggableWidgets/rich-text-web/CHANGELOG.md

@@ -10,6 +10,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - We fixed an issue where in dojo mode, the rich text modal was causing a double scrollbar.
 
+### Added
+
+- We added character count options to the status bar to help users understand content length requirements and avoid validation failures when rich text HTML markup exceeds database attribute limits.
+
 ## [4.9.0] - 2025-09-03
 
 ### Added