chore: add changeset for v3.28.9 (#8336)

.changeset/v3.28.9.md

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+---
+"roo-cline": patch
+---
+
+![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!)