docs: change naming of Next.js starter (#4494)

docs/content/plugins/notifications/sendgrid.mdx

@@ -3969,7 +3969,7 @@ To test it out, perform an action that would trigger one of the emails being sen
 
 :::tip
 
-If you don’t have a storefront installed, check out the [Next.js](../../starters/nextjs-medusa-starter.mdx) starter storefront.
+If you don’t have a storefront installed, check out the [Next.js Starter Template](../../starters/nextjs-medusa-starter.mdx).
 
 :::
 

docs/content/plugins/notifications/slack.md

@@ -103,4 +103,4 @@ That’s all you need to do to integrate Slack into Medusa!
 ## See Also
 
 - Install [Medusa's Admin](../../admin/quickstart.mdx) for the full order-management experience.
-- Install the [Next.js](../../starters/nextjs-medusa-starter.mdx) starter storefront.
+- Install the [Next.js Starter Template](../../starters/nextjs-medusa-starter.mdx).

docs/content/plugins/notifications/twilio-sms.md

@@ -127,7 +127,7 @@ If you create an order now on your storefront, you should receive a message from
 
 :::tip
 
-If you don’t have a storefront set up yet, you can install the [Next.js starter storefront](../../starters/nextjs-medusa-starter.mdx).
+If you don’t have a storefront set up yet, you can install the [Next.js Starter Template](../../starters/nextjs-medusa-starter.mdx).
 
 :::