Update CHANGELOG.md

Author: RobertoPrevato

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.4.1] - 2026-03-??
+
+- Fix handling of `enum` without declared `type`, like reported in [#64](https://github.com/Neoteroi/essentials-openapi/issues/64) by @jan-ldwg.
+
 ## [1.4.0] - 2026-03-07 :copilot:
 
 - Add OAS 3.1 support, cross-version warnings, and fix nullable spacing, by @dcode.