chore: update copyright in about dialog

Author: tfuxu

halftone/views/about_window.py

@@ -1,4 +1,4 @@
-# Copyright 2023-2024, tfuxu <https://github.com/tfuxu>
+# Copyright 2023-2025, tfuxu <https://github.com/tfuxu>
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from gi.repository import Gtk, Adw
@@ -31,7 +31,7 @@ def setup(self):
             ],
             # TRANSLATORS: This is a place to put your credits (formats: "Name https://example.com" or "Name <[email protected]>", no quotes) and is not meant to be translated literally.
             translator_credits=_("translator-credits"),
-            copyright="Copyright © 2023 tfuxu",
+            copyright="Copyright © 2023-2025 tfuxu",
             license_type=Gtk.License.GPL_3_0,
             version=constants.version,
             release_notes_version=constants.rel_ver,