fixes trace imports

Author: celso

src/content/docs/browser-rendering/platform/playwright.mdx

@@ -105,7 +105,7 @@ Here's an example of a worker generating a trace file:
 ```ts
 import type { Fetcher } from '@cloudflare/workers-types';
 import { launch, fs } from "@cloudflare/playwright";
-import { expect } from "@cloudflare/playwright/test";
+import fs from '@cloudflare/playwright/fs';
 
 interface Env {
   MYBROWSER: Fetcher;