[neon-notifications] pyqt5 new version 5.15.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_forks_pyqt5/164/display/redirect

#<Debian::UScan::DEHS::Package:0x00005568431d7080 @name="pyqt5", @debian_uversion="5.14.1+dfsg", @debian_mangled_uversion="5.14.1", @upstream_version="5.15.3", @upstream_url="https://pypi.debian.net/PyQt5/PyQt5-5.15.3.tar.gz", @status="Newer version available">