patterns/containers: Fix GTK4 GtkListBox link
The API Reference link for GTK4: GtkListBox has an extra 'h' (hhttps rather than https), so the link doesn't work correctly. This fixes the link so that it works correctly.
The API Reference link for GTK4: GtkListBox has an extra 'h' (hhttps rather than https), so the link doesn't work correctly. This fixes the link so that it works correctly.