Remove Release header from changelog

Author: jan-di

CHANGELOG.md

@@ -5,7 +5,6 @@ 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]
-## [1.1.0] - 2026-01-07
 
 ### Added
 - Decryption script and instructions in README