fix error line

src/pages/admin/Activity.jsx

@@ -121,7 +121,7 @@ export default function AdminActivity() {
   const recent = useMemo(
     () => events
       .slice()
-      .sort((a, b) => new Date(b.created_date) - new Date(a.created_date))
+      .sort((a, b) => new Date(b.created_date).getTime() - new Date(a.created_date).getTime())
       .slice(0, TIMELINE_LIMIT),
     [events]
   );