Update CHANGELOG for version 1.3.0 features

Added LaTeX rendering support and a warning about browser compatibility.

Author: thiagogq

CHANGELOG.md

@@ -9,8 +9,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- LaTeX rendering support
 - Warning informing users that the editor works best in Chromium‑based browsers.
 
+### Fixed
+
+- Image insertion
+
 ## [1.2.3] - 2026-01-06
 
 ### Fixed