Update CHANGELOG.md

Author: mrubens

CHANGELOG.md

@@ -1,8 +1,15 @@
 # Roo Code Changelog
 
-## [3.11.18]
-
-- v3.12.0
+## [3.12.0] - 2025-04-15
+
+- Add xAI provider and expose reasoning effort options for Grok on OpenRouter
+- Make diff editing config per-profile and improve pre-diff string normalization
+- Make checkpoints faster and more reliable
+- Add a search bar to mode and profile select dropdowns (thanks @samhvw8!)
+- Add telemetry for code action usage, prompt enhancement usage, and consecutive mistake errors
+- Suppress zero cost values in the task header (thanks @do-it!)
+- Make JSON parsing safer to avoid crashing the webview on bad input
+- Allow users to bind a keyboard shortcut for accepting suggestions or input in the chat view (thanks @axkirillov!)
 
 ## [3.11.17] - 2025-04-14