beforeunload event requires sticky activation (#32479)

The beforeunload event requires Sticky activation, not Transient activation. https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event#usage_notes notes the same

files/en-us/web/security/user_activation/index.md

@@ -28,7 +28,6 @@ If an activation has been triggered, the user agent differentiates between two t
 
 APIs that require transient activation (list is not exhaustive):
 
-- {{domxref("Window/beforeunload_event", "beforeunload")}} event
 - {{domxref("Clients.openWindow()")}}
 - {{domxref("Clipboard.read()")}}
 - {{domxref("Clipboard.readText()")}}
@@ -73,6 +72,7 @@ APIs that require transient activation (list is not exhaustive):
 
 APIs that require sticky activation (not exhaustive):
 
+- {{domxref("Window/beforeunload_event", "beforeunload")}} event
 - {{domxref("Navigator.vibrate()")}}
 - {{domxref("VirtualKeyboard.show()")}}
 - Autoplay of [Media and Web Audio APIs](/en-US/docs/Web/Media/Autoplay_guide) (in particular for [`AudioContexts`](/en-US/docs/Web/API/AudioContext)).