Update CHANGELOG for version 3.26.4 release

Author: mrubens

CHANGELOG.md

@@ -1,10 +1,14 @@
 # Roo Code Changelog
 
-## 3.26.4
+## [3.26.4] - 2025-09-01
 
-### Patch Changes
+![3.26.4 Release - Memory Optimization](/releases/3.26.4-release.png)
 
-- ![3.26.4 Release - Memory Optimization](/releases/3.26.4-release.png)
+- Optimize memory usage for image handling in webview (thanks @daniel-lxs!)
+- Fix: Special tokens should not break task processing (#7539 by @pwilkin, PR by @pwilkin)
+- Add Ollama API key support for Turbo mode (#7147 by @LivioGama, PR by @app/roomote)
+- Rename Account tab to Cloud tab for clarity (thanks @app/roomote!)
+- Add kangaroo-themed release image generation (thanks @mrubens!)
 
 ## [3.26.3] - 2025-08-29