docs(browser-rendering): note Stagehand v2.5.x requirement (#27339)

* docs(browser-rendering): note Stagehand v2.5.x requirement

* Update src/content/docs/browser-rendering/stagehand.mdx

Co-authored-by: ToriLindsay <tgalatro@cloudflare.com>

---------

Co-authored-by: ToriLindsay <tgalatro@cloudflare.com>

Author: kathayl

src/content/docs/browser-rendering/stagehand.mdx

@@ -21,6 +21,11 @@ import {
 
 This guide shows you how to deploy a [Worker](/workers/) that uses Stagehand, Browser Rendering, and [Workers AI](/workers-ai/) to automate a web task.
 
+:::note
+Browser Rendering currently supports `@browserbasehq/stagehand` `v2.5.x` only.
+Stagehand `v3` and later are not supported because they are not Playwright-based.
+:::
+
 ## Use Stagehand in a Worker with Workers AI
 
 In this example, you will use Stagehand to search for a movie on this [example movie directory](https://demo.playwright.dev/movies), extract its details (title, year, rating, duration, and genre), and return the information along with a screenshot of the webpage.
@@ -158,7 +163,7 @@ Ensure your `package.json` has the following dependencies:
 	{
 		// ...
 		"dependencies": {
-			"@browserbasehq/stagehand": "^2.5.0",
+			"@browserbasehq/stagehand": "2.5.x",
 			"@cloudflare/playwright": "^1.0.0",
 			"zod": "^3.25.76",
 			"zod-to-json-schema": "^3.24.6"