Merge branch 'fix-notifications-index' into 'main'

Fix notifications index

See merge request soapbox-pub/rebased!301

lib/pleroma/notification.ex

@@ -93,7 +93,7 @@ def last_read_query(user) do
       where: q.seen == true,
       select: type(q.id, :string),
       limit: 1,
-      order_by: [desc: :id]
+      order_by: fragment("? desc nulls last", q.id)
     )
   end