Update CHANGELOG.md

Co-authored-by: Taylor Steinberg <taylor@steinberg.xyz>

Author: dbkegley

CHANGELOG.md

@@ -4,8 +4,6 @@ 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).
 
-## Unreleased
-
 ## [1.20.0] - 2023-09-11
 
 ### Fixed