Fix: return refreshed Page from Browser.new_page/2

It's the newly "patched" (co-dependent w/ its related `BrowserContext` that needs to be returned.

lib/playwright/browser.ex

@@ -722,7 +722,6 @@ defmodule Playwright.Browser do
         # establish co-dependency
         Channel.patch(session, {:guid, context.guid}, %{owner_page: page})
         Channel.patch(session, {:guid, page.guid}, %{owned_context: context})
-        page
     end
   end