docs: update copyright year

Author: DCsunset

README.md

@@ -194,7 +194,7 @@ The example below shows how to define a substate only for org-mode and normal st
 
 AGPL-3.0.
 
-    Copyright (C) 2023  DCsunset
+    Copyright (C) 2023-2024  DCsunset
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as published

modaled.el

@@ -1,6 +1,6 @@
 ;;; modaled.el --- Build your own minor modes for modal editing  -*- lexical-binding: t; -*-
 ;;
-;; Copyright (C) 2023  DCsunset
+;; Copyright (C) 2023-2024  DCsunset
 ;;
 ;; Author: DCsunset
 ;; URL: https://github.com/DCsunset/modaled