[doc] Update CHANGELOG

Author: ptaoussanis

CHANGELOG.md

@@ -17,11 +17,26 @@ It **drops support for Clojure v1.9** but should otherwise be a safe update for
 - **\[mod]** Drop official Clojure v1.9 support
 - **\[mod]** Now **throw** on invalid compile-time min-level \[a393582b]
 - \[new] Use [Truss exceptions](https://cljdoc.org/d/com.taoensso/truss/CURRENT/api/taoensso.truss#ex-info) on errors \[ad4a37c1]
+- \[fix] [#396] `ClassCastException` when using a `println-appender` with `{:stream :std-out}`
 - \[fix] [#394] OTLP appender: fix reflection (@ericdallo) \[44829cd7]
 - \[doc] Mention limitation on compile-time min-level \[b97ad982]
 
 ---
 
+# `v6.6.2` (2025-05-12)
+
+- **Main dependency**: [on Clojars](https://clojars.org/com.taoensso/timbre/versions/6.6.2)
+- **SLF4J provider**: [on Clojars](https://clojars.org/com.taoensso/timbre-slf4j/versions/6.6.2)
+- **Versioning**: [Break Versioning](https://www.taoensso.com/break-versioning)
+
+This is a **hotfix release**.
+
+## Since `v6.6.1` (2024-10-30)
+
+- \[fix] [#396] `ClassCastException` when using a `println-appender` with `{:stream :std-out}`
+
+---
+
 # `v6.6.1` (2024-10-30)
 
 - **Main dependency**: [on Clojars](https://clojars.org/com.taoensso/timbre/versions/6.6.1)