fix return types

src/app/components/error-card.tsx

@@ -1,10 +1,11 @@
+import { ReactElement } from "react";
 import { Card } from "./card";
 
 type ErrorProps = {
   message: string;
 };
 
-export function ErrorCard({ message }: ErrorProps): JSX.Element {
+export function ErrorCard({ message }: ErrorProps): ReactElement {
   return (
     <Card>
       <div className="flex flex-col justify-center text-center">