style: format code with prettier

src/app/admin/online/loading.tsx

@@ -1,4 +1,4 @@
-import { Skeleton } from '@/components/ui/skeleton'
+import { Skeleton } from "@/components/ui/skeleton";
 
 export default function OnlineLoading() {
   return (
@@ -24,5 +24,5 @@ export default function OnlineLoading() {
         ))}
       </div>
     </div>
-  )
+  );
 }