Bug#1000549: Knotifications leaks file descriptors using phonon and should use canberra instead.

[Jens Scheidtmann <jens.scheidtmann@gmail.com>]

Package: libkf5notifications5

Version: 5.54.0-1

On Raspian (armhf), numerous Kstars users have problems due to phonon leaking  file descriptors, which is invoked from knotifications, see 

https://bugs.kde.org/show_bug.cgi?id=444407

Harald Sitter recommending to compile knotifications against Canberra instead.

Original reports see here: 

https://indilib.org/forum/ekos/10705-kstars-ekos-freezing-on-large-image-sequences-astroberry.html#77529