docs: update CHANGELOG.md

CHANGELOG.md

@@ -5,6 +5,12 @@ 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).
 
+## [Unreleased]
+### Fixed
+- helsinki importer: Make tolerance for divisions extending past their parents relative to parent
+  area (from 300 m^2 to 0.1% of parent area)
+- helsinki importer: Update `statistical_district` WFS layer value
+
 ## [0.3.10]
 ### Fixed
 - Fix Helsinki importer urls