fix(data): update documentation for list items (#8393)

Author: Simone319

src/pages/[platform]/build-a-backend/data/query-data/index.mdx

@@ -56,7 +56,7 @@ import { type Schema } from '@/amplify/data/resource';
 
 const client = generateClient<Schema>();
 
-// list all items
+// list items
 const { data: todos, errors } = await client.models.Todo.list();
 
 // get a specific item