Update reference to new script file

Author: ankur22

docs/sources/k6/v1.3.x/using-k6-browser/migrate-from-playwright-to-k6.md

@@ -214,7 +214,7 @@ test('user', async ({ page }) => {
 });
 ```
 
-To convert this Playwright script to k6, create a new file named `pw-migrated.js`.
+To convert this Playwright script to k6, create a new file named `pw-multiple-migrated.js`.
 
 First, create two `scenarios` and point them to two exported functions using the `exec` field in each scenario: