[neon-notifications] Dev Required: libsdl2 - 2.30.0

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-jammy_libsdl2/53/display/redirect

#<Debian::UScan::DEHS::Package:0x000056278ef7da80 @name="libsdl2", @debian_uversion="2.28.5+dfsg", @debian_mangled_uversion="2.28.5", @upstream_version="2.30.0", @upstream_url="https://github.com/libsdl-org/SDL/releases/download/release-2.30.0/SDL2-2.30.0.tar.gz", @status="Newer version available">