playground: fix pay example imports

Author: alecananian

apps/playground-web/src/app/connect/pay/transactions/page.tsx

@@ -114,7 +114,7 @@ function NoFundsPopup() {
       <CodeExample
         preview={<PayTransactionButtonPreview />}
         code={`import { trasnfer } from "thirdweb/extensions/erc1155";
-          import { PayEmbed, useActiveAccount } from "thirdweb/react";
+          import { TransactionButton, useActiveAccount } from "thirdweb/react";
 
 
         function App() {