update db from dbt-tutorial to raw

this pr updates the quickstarts database example to `raw` and not `dbt-tutorial`, which is the legacy db.

this was raised by CS as a user was experiencing errors. https://dbt-labs.slack.com/archives/C02NCQ9483C/p1709805810303419

website/snippets/quickstarts/_build-your-first-model.md

@@ -18,7 +18,7 @@ with customers as (
         first_name,
         last_name
 
-    from `dbt-tutorial`.jaffle_shop.customers
+    from raw.jaffle_shop.customers
 
 ),
 
@@ -30,7 +30,7 @@ orders as (
         order_date,
         status
 
-    from `dbt-tutorial`.jaffle_shop.orders
+    from raw.jaffle_shop.orders
 
 ),