Update changelog

Author: cmd-ntrf

CHANGELOG.md

@@ -3,6 +3,12 @@ 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/).
 
+## [15.4.1] 2026-05-01
+
+### Added
+
+- Added `initcall_blacklist=algif_aead_init` to kernel arguments via cloud-init to patch [CopyFail](https://copy.fail/#exploit) CVE. (PR #423)
+
 ## [15.4.0] 2026-04-25
 
 ### Added