[gnome-builder] Update template with current year, remove copyright symbol

[Günther Wagner <gwagner src gnome org>]

commit ccb8ca076bdd969a87464e4f3cd8fff714f13ca0
Author: Antóin Óg Ó Cuinneagáin <anthony cunningham gmail com>
Date:   Tue Feb 22 13:20:58 2022 +0000

    Update template with current year, remove copyright symbol

 src/plugins/meson-templates/resources/src/window-gtk4.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/meson-templates/resources/src/window-gtk4.py 
b/src/plugins/meson-templates/resources/src/window-gtk4.py
index 0ca7c57c2..17b378d56 100644
--- a/src/plugins/meson-templates/resources/src/window-gtk4.py
+++ b/src/plugins/meson-templates/resources/src/window-gtk4.py
@@ -20,7 +20,7 @@ class AboutDialog(Gtk.AboutDialog):
         self.props.program_name = '{{name}}'
         self.props.version = "0.1.0"
         self.props.authors = ['{{author}}']
-        self.props.copyright = '(C) 2021 {{author}}'
+        self.props.copyright = '2022 {{author}}'
         self.props.logo_icon_name = '{{appid}}'
         self.props.modal = True
         self.set_transient_for(parent)