docs: replace retired hostnameAllowlist in browser-control example

Co-authored-by: Ali Adnan <165782963+AAliKKhan@users.noreply.github.com>

docs/tools/browser-control.md

@@ -504,8 +504,7 @@ Strict-mode example (block private/internal destinations by default):
   browser: {
     ssrfPolicy: {
       dangerouslyAllowPrivateNetwork: false,
-      hostnameAllowlist: ["*.example.com", "example.com"],
-      allowedHostnames: ["localhost"], // optional exact allow
+      allowedHostnames: ["*.example.com", "example.com"],
     },
   },
 }