[libadwaita/wip/exalm/about-final] about-window: Use G_DEFINE_FINAL_TYPE

[Alexander Mikhaylenko <alexm src gnome org>]

commit e5ccd3e99c3c033f185a3775dbccc4f9942f8b59
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Jul 11 18:07:28 2022 +0400

    about-window: Use G_DEFINE_FINAL_TYPE
    
    Since this is an older branch, it didn't use it. Fix that.

 src/adw-about-window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/adw-about-window.c b/src/adw-about-window.c
index 42b0bd3a..82abb763 100644
--- a/src/adw-about-window.c
+++ b/src/adw-about-window.c
@@ -274,7 +274,7 @@ struct _AdwAboutWindow {
   gboolean has_custom_links;
 };
 
-G_DEFINE_TYPE (AdwAboutWindow, adw_about_window, ADW_TYPE_WINDOW)
+G_DEFINE_FINAL_TYPE (AdwAboutWindow, adw_about_window, ADW_TYPE_WINDOW)
 
 enum {
   PROP_0,