Revise CHANGELOG for version 3.28.9

Updated changelog for version 3.28.9 with new features, improvements, and fixes.

Author: mrubens

CHANGELOG.md

@@ -1,10 +1,18 @@
 # Roo Code Changelog
 
-## 3.28.9
-
-### Patch Changes
-
-- ![3.28.9 Release - Supernova Upgrade](/releases/3.28.9-release.png)
+## [3.28.9] - 2025-09-26
+
+![3.28.9 Release - Supernova Upgrade](/releases/3.28.9-release.png)
+
+- The free Supernova model now has a 1M token context window (thanks @mrubens!)
+- Experiment to show the Roo provider on the welcome screen (thanks @mrubens!)
+- Web: Website improvements to https://roocode.com/ (thanks @brunobergher!)
+- Fix: Remove <thinking> tags from prompts for cleaner output and fewer tokens (#8318 by @hannesrudolph, PR by @app/roomote)
+- Correct tool use suggestion to improve model adherence to suggestion (thanks @hannesrudolph!)
+- feat: log out from cloud when resetting extension state (thanks @app/roomote!)
+- feat: Add telemetry tracking to DismissibleUpsell component (thanks @app/roomote!)
+- refactor: remove pr-reviewer mode (thanks @daniel-lxs!)
+- Removing user hint when refreshing models (thanks @requesty-JohnCosta27!)
 
 ## [3.28.8] - 2025-09-25