Changelog updates for 0.21.3

Author: Diptorup Deb

CHANGELOG.md

@@ -4,10 +4,26 @@ 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).
 
+## [0.21.3] - 2023-09-21
+
+### Fixed
+* Mangled kernel name generation (#1112)
+
+### Added
+* Python 3.11 support (#1123)
+* Security policy (#1117)
+* scikit-build to build native extensions (#1107, #1127)
+
+### Changed
+* The data model used by the DpnpNdArray type for kernel functions(#1118)
+
+### Removed
+* Support for Python 3.8 (#1113)
+
 ## [0.21.2] - 2023-08-07
 
 ### Fixed
-* Bugs (#1068, #774) in atomic addition caused due to imporper floating point atomic emulation. (#1103)
+* Bugs (#1068, #774) in atomic addition caused due to improper floating point atomic emulation. (#1103)
 
 ### Changed
 * Updated documentation and user guides (#1097, #879)