[neon-notifications] Dev Required: assimp - 5.2.3

[Neon CI]

https://build.neon.kde.org/job/watcher_release_backports-focal_assimp/134/display/redirect

#<Debian::UScan::DEHS::Package:0x000055f8b96b0348 @name="assimp", @debian_uversion="5.2.2~ds0", @debian_mangled_uversion="5.2.2", @upstream_version="5.2.3", @upstream_url="https://github.com/assimp/assimp/archive/refs/tags/v5.2.3.tar.gz", @status="Newer version available">