Update get-started.mdx

We were using .run() instead of .all()
If my knowledge is correct:
1. we use .all() for SELECT queries to get the actual rows.
2. we use  .run() is for INSERT/UPDATE/DELETE and returns metadata.

In the description below, we were explaining for ".all()" but were using ".run()" in actual code.

Author: Shad0wKillar

src/content/docs/d1/get-started.mdx

@@ -342,7 +342,7 @@ After you have set up your database, run an SQL query from within your Worker.
     				"SELECT * FROM Customers WHERE CompanyName = ?",
     			)
     				.bind("Bs Beverages")
-    				.run();
+    				.all();
     			return Response.json(results);
     		}
 
@@ -387,7 +387,7 @@ You can query your D1 database using your Worker.
     				"SELECT * FROM Customers WHERE CompanyName = ?"
     			)
     				.bind("Bs Beverages")
-    				.run();
+    				.all();
     			return new Response(JSON.stringify(results), {
     				headers: { 'Content-Type': 'application/json' }
     			});