[neon-notifications] Dev Required: immer - 0.8.1

[Neon CI]

https://build.neon.kde.org/job/watcher_release_3rdparty_immer/50/display/redirect

#<Debian::UScan::DEHS::Package:0x0000558b6e068660 @name="immer", @debian_uversion="0.8.0+dfsg", @debian_mangled_uversion="0.8.0", @upstream_version="0.8.1", @upstream_url="https://github.com/arximboldi/immer/archive/refs/tags/v0.8.1.tar.gz", @status="Newer version available">