Update documentation for version 1.3.1

Slightly cleaned up the documentation section.

Author: Andrew-S-Rosen

CHANGELOG.md

@@ -4,6 +4,12 @@ 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/), and this project generally adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.3.1]
+
+### Documentation
+
+- Slight cleanup
+
 ## [1.3.0]
 
 ### Added