docs: add vale rule for Next.js Starter Storefront (#12517)

www/apps/resources/app/deployment/storefront/vercel/page.mdx

@@ -6,12 +6,12 @@ import RewritesError from "../../../troubleshooting/_sections/storefront/rewrite
 import { Prerequisites, DetailsList } from "docs-ui"
 
 export const metadata = {
-  title: `Deploy Medusa Next.js to Vercel`,
+  title: `Deploy Next.js Starter Storefront to Vercel`,
 }
 
 # {metadata.title}
 
-In this document, you’ll learn how to deploy the Next.js storefront to [Vercel](https://vercel.com).
+In this document, you’ll learn how to deploy the Next.js Starter Storefront to [Vercel](https://vercel.com).
 
 <Prerequisites items={[
   {