Releasing version 12.3.1

Author: github-actions[bot]

README.adoc

@@ -4,7 +4,7 @@
 :project-repo:    maven
 :project-name:    ikonli
 :project-group:   org.kordamp.ikonli
-:project-version: 12.3.0
+:project-version: 12.3.1
 
 image:https://github.com/{project-owner}/{project-name}/workflows/Build/badge.svg["Build Status", link="https://github.com/{project-owner}/{project-name}/actions"]
 image:https://img.shields.io/maven-central/v/{project-group}/{project-name}-core.svg?label=maven[link="https://search.maven.org/#search|ga|1|{project-group}"]

VERSION

@@ -1 +1 @@
-12.4.0-SNAPSHOT
+12.3.1