Ubuntu 24.04 Suppport

[Wanni]

While Jellyfin runs fine on 24.04 I'm getting the following new message after an "apt update":

N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://repo.jellyfin.org/ubuntu noble InRelease' doesn't support architecture 'i386'
N: Missing Signed-By in the sources.list(5) entry for 'https://repo.jellyfin.org/ubuntu'

While before 24. you could add [arch=amd64] the new sources file looks different, so I see no possibility adding this:

cat jellyfin.sources

Types: deb
URIs: https://repo.jellyfin.org/ubuntu
Suites: noble
Components: main

Any idea how to fix this?