chore: Update copyright year

jcs090218 · web-flow · commit 0730e2118736 · 2024-01-01T02:06:33.000-08:00
diff --git a/undersea-theme.el b/undersea-theme.el
@@ -1,6 +1,6 @@
 ;;; undersea-theme.el --- Theme styled after undersea imagery  -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2020  Shen, Jen-Chieh
+;; Copyright (C) 2020-2024  Shen, Jen-Chieh
 ;; Created date 2020-07-16 00:16:27
 
 ;; Author: Shen, Jen-Chieh <jcs090218@gmail.com>
