Update changelog

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -5,7 +5,7 @@ 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).
 
-## [4.5.x]
+## [4.5.x] (unreleased)
 
 ### Added
 
@@ -16,7 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Locally defined `tr` has been dropped, templates updated to use Sprig replace.
-- Updated the glossary #819
+- Updated the glossary. #819
 
 ### Fixed
 
@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Systems with no SMBIOS (Raspberry Pi) will create a UUID from
   `/sys/firmware/devicetree/base/serial-number`
 - Fix `wwctl profile list -a` format when kernerargs are set
+- Fix a rendering bug in the documentation for GRUB boot support. #1132
 
 ## [4.5.0] 2024-02-08