docs: add line highlight validation (#14380)

* docs: add line highlight validation

* add to all projects

* fixes

* fixes

* fix

* fixes

www/apps/resources/app/storefront-development/regions/context/page.mdx

@@ -48,7 +48,7 @@ export const highlights = [
   ["38", "regionId", "Retrieve the selected region from the `localStorage`."],
   ["41", "list", "If no region is selected, retrieve the list of regions from the Medusa application and select the first one."],
   ["47", "retrieve", "If a region is selected, retrieve it from the Medusa application."],
-  ["6", "useRegion", "The hook that child components of the provider use to access the region."]
+  ["64", "useRegion", "The hook that child components of the provider use to access the region."]
 ]
 
 ```tsx highlights={highlights}

www/apps/resources/app/storefront-development/regions/list/page.mdx

@@ -33,11 +33,7 @@ Learn how to install and configure the JS SDK in the [JS SDK documentation](../.
 <CodeTabs group="store-request">
   <CodeTab label="React" value="react">
 
-export const highlights = [
-  ["18"], ["19"], ["20"], ["21"], ["22"]
-]
-
-  ```tsx highlights={highlights}
+  ```tsx highlights={[["18"], ["19"], ["20"], ["21"], ["22"]]}
   "use client" // include with Next.js 13+
 
   import { useEffect, useState } from "react"