Revise CHANGELOG for version 3.26.6

Updated changelog for version 3.26.6 with new features and fixes.

Author: mrubens

CHANGELOG.md

@@ -1,10 +1,13 @@
 # Roo Code Changelog
 
-## 3.26.6
+## [3.26.6] - 2025-09-03
 
-### Patch Changes
+![3.26.6 Release - Bug Fixes and Tool Improvements](/releases/3.26.6-release.png)
 
-- ![3.26.6 Release - Bug Fixes and Tool Improvements](/releases/3.26.6-release.png)
+- Add experimental run_slash_command tool to let the model initiate slash commands (thanks @app/roomote!)
+- Fix: use askApproval wrapper in insert_content and search_and_replace tools (#7648 by @hannesrudolph, PR by @app/roomote)
+- Add Kimi K2 Turbo model configuration to moonshotModels (thanks @wangxiaolong100!)
+- Fix: preserve scroll position when switching tabs in settings (thanks @DC-Dancao!)
 
 ## [3.26.5] - 2025-09-03