Docs: Update changelog

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.18.3] (2026-04-16)
+
+### Fixes
+
+- Fixed FragmentedSurface errors reporting roof BoundarySurfaces as ground BoundarySurfaces
+- Fixed degenerated triangles causing false-positive detection of AllPolygonsWrongOrientation errors
+- Fixed -db_location and -db_settings arguments not being parsed when starting the GUI from the CLI
+
 ## [3.18.2] (2026-02-24)
 
 ### Added