chore: Update copyright year

jcs090218 · jcs090218 · commit 8d7ef3164747 · 2026-01-01T13:42:13.000+08:00
diff --git a/sideline-sly.el b/sideline-sly.el
@@ -1,6 +1,6 @@
 ;;; sideline-sly.el --- Show SLY result with sideline  -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2024-2025  Shen, Jen-Chieh
+;; Copyright (C) 2024-2026  Shen, Jen-Chieh
 
 ;; Author: Shen, Jen-Chieh <jcs090218@gmail.com>
 ;; Maintainer: Shen, Jen-Chieh <jcs090218@gmail.com>
