docs: update customize stripe in next.js storefront guide (#12963)

* docs: update customize stripe in next.js storefront guide

* change user to customer

www/packages/tags/src/tags/payment.ts

@@ -8,7 +8,7 @@ export const payment = [
     "path": "https://docs.medusajs.com/resources/how-to-tutorials/tutorials/saved-payment-methods"
   },
   {
-    "title": "Customize the Stripe Integration in the Next.js Starter",
+    "title": "Customize Stripe in Next.js Starter",
     "path": "https://docs.medusajs.com/resources/nextjs-starter/guides/customize-stripe"
   },
   {

www/packages/tags/src/tags/storefront.ts

@@ -1,6 +1,6 @@
 export const storefront = [
   {
-    "title": "Customize the Stripe Integration in the Next.js Starter",
+    "title": "Use Stripe's Payment Element in the Next.js Starter Storefront",
     "path": "https://docs.medusajs.com/resources/nextjs-starter/guides/customize-stripe"
   },
   {