docs: improve docs contribution guidelines (#13605)

* docs: improve docs contribution guidelines

* fix build error

* fix build errors

* fix build

* fix build

www/apps/resources/app/nextjs-starter/guides/storefront-returns/page.mdx

@@ -1257,7 +1257,7 @@ You can learn more about creating return reasons in the [Manage Return Reasons](
 Next, you need to create a customer account from the Next.js Starter Storefront. To do that:
 
 1. Go to Account.
-2. Click the "Join us" link.
+2. Click the `Join us` link.
 3. Enter the customer's details like email and password.
 4. Click "Join" to create the account.