Update CHANGELOG for version 0.3.11

Author: gkjohnson

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [0.3.11] - 2025-11-14
+### Fixed
+- Switch to use "expr-eval-fork" from "expr-eval" due to security fixes.
+
 ## [0.3.10] - 2025-06-22
 ### Added
 - Support for "tau" in expressions.