[neon-notifications] Dev Required: pyside2 - 5.15.15

[Neon CI]

https://build.neon.kde.org/job/watcher_release_qt_pyside2/29/display/redirect

#<Debian::UScan::DEHS::Package:0x00007f76c1f6c1d0 @name="pyside2", @debian_uversion="5.15.14", @debian_mangled_uversion="5.15.14", @upstream_version="5.15.15", @upstream_url="https://download.qt.io/official_releases/QtForPython/pyside2/PySide2-5.15.15-src/pyside-setup-opensource-src-5.15.15.tar.xz", @status="Newer version available">