chore: update CHANGELOG for #1031

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: brendan-kellam

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed issue where ask responses would sometimes appear in the details panel while generating. [#1014](https://github.com/sourcebot-dev/sourcebot/pull/1014)
 - Fixed reference panel overflow issue in the ask UI. [#1014](https://github.com/sourcebot-dev/sourcebot/pull/1014)
 - Fixed homepage scrolling issue in the ask UI. [#1014](https://github.com/sourcebot-dev/sourcebot/pull/1014)
+- Fixed auto-scroll behavior in the ask chat thread by replacing the manual scroll implementation with `useStickToBottom`. [#1031](https://github.com/sourcebot-dev/sourcebot/pull/1031)
 
 ## [4.15.11] - 2026-03-20