Update changelog

Author: altavir

CHANGELOG.md

@@ -7,25 +7,36 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## 0.20.2-kotlin-2.3.0 - 2025-12-17
+
+### Added
+
 - WasmWasi target
 
 ### Changed
+
 - Kotlin 2.3.0
 - Maturity moved to kscience extension.
 - Readme extension now requires kscience extension.
 - Project plugin overhaul (not only publish)
 - ABI validation is configurable from the root project
 
-### Deprecated
-
-### Removed
-
 ### Fixed
+
 - Context parameter flag
 - Deploy problem with opensavvy-resources
 
-### Security
-
 ## 0.19.0-kotlin-2.2.0 - 2025-07-24
 
 ### Changed
@@ -45,7 +56,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `fullStackApplication` configuration. Replaced by optional field in `fullStack`
 - Jupyter integration
 
-## 0.17.x
+## 0.17.0
 
 ### Added