[gnome-clocks] Stop using Gtk.Bin

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 809dc5d1756eb5bf68e296fca31903f9696f4dfa
Author: Yetizone <andreii lisita gmail com>
Date:   Sun Jan 3 18:11:26 2021 +0200

    Stop using Gtk.Bin
    
    Gtk.Bin is gone in GTK4

 src/alarm-ringing-panel.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/alarm-ringing-panel.vala b/src/alarm-ringing-panel.vala
index 29f40758..c24709a9 100644
--- a/src/alarm-ringing-panel.vala
+++ b/src/alarm-ringing-panel.vala
@@ -21,7 +21,7 @@ namespace Clocks {
 namespace Alarm {
 
 [GtkTemplate (ui = "/org/gnome/clocks/ui/alarm-ringing-panel.ui")]
-private class RingingPanel : Gtk.Bin {
+private class RingingPanel : Adw.Bin {
     public Item? alarm {
         get {
             return _alarm;