Added relations import to setup example.

Author: Chriztiaan

client-sdk-references/javascript-web/javascript-orm/drizzle.mdx

@@ -21,6 +21,7 @@ Currently, you need to create the Drizzle schema manually, and it should match t
 ```js
 import { wrapPowerSyncWithDrizzle } from "@powersync/drizzle-driver";
 import { PowerSyncDatabase } from "@powersync/web";
+import { relations } from "drizzle-orm";
 import { index, integer, sqliteTable, text } from "drizzle-orm/sqlite-core";
 import { appSchema } from "./schema";