Change text from "Attention" to "Warning" (#13973)

Fixes #13972

packages/next/export/index.ts

@@ -330,7 +330,7 @@ export default async function exportApp(
   // Warn if the user defines a path for an API page
   if (hasApiRoutes) {
     log(
-      chalk.bold.red(`Attention`) +
+      chalk.bold.red(`Warning`) +
         ': ' +
         chalk.yellow(
           `Statically exporting a Next.js application via \`next export\` disables API routes.`