[REG] recentlyAudible does not implement 2s cooldown anymore

According to the docs:

if the audio is paused, [the {{recentlyAudibleChanged}}] signal is emitted with an approximate two-second delay, from the moment the audio is paused.

I remember this being the case around QtWebEngine 5.11 or so (which I can't test right now), but it seems that behavior was lost at some point. Either it should be restored, or the documentation should be adjusted (it's easy enough to implement a custom cooldown via QTimer).

Reproducer:

import sys
import argparse

from PySide6.QtCore import QUrl
from PySide6.QtWidgets import QApplication
from PySide6.QtWebEngineWidgets import QWebEngineView

app = QApplication([])
wv = QWebEngineView()
wv.page().recentlyAudibleChanged.connect(lambda audible: print(f"Audible: {audible}"))
wv.load(QUrl("https://www.youtube.com/watch?v=FITMn1imWsQ"))
wv.show()
app.exec()

As soon as audible: True is printed, e.g. skip in the video, and note how audible: False and audible: True gets printed immediately. With an UI displaying an "audible" indicator, this results in an erratic/flickering indicator when people are e.g. speaking in a video and pause talking.