Update CHANGELOG.md

Author: mrubens

CHANGELOG.md

@@ -1,11 +1,12 @@
 # Roo Code Changelog
 
-## 3.3.20
+## [3.3.20]
 
-### Patch Changes
-
-- Disable writing in ask mode
-- v3.3.20
+- Support project-specific custom modes in a .roomodes file
+- Add more Mistral models (thanks @d-oit and @bramburn!)
+- By popular request, make it so Ask mode can't write to Markdown files and is purely for chatting with
+- Add a setting to control the number of open editor tabs to tell the model about (665 is probably too many!)
+- Fix race condition bug with entering API key on the welcome screen
 
 ## [3.3.19]