升级至Ubuntu 24.04后sources.list条目缺失Signed-By字段的问题求助

大家好，希望你们一切都好。我通过Gnome软件更新器把Ubuntu从23.10升级到24.04 LTS之后，就出现了这个问题。

下面是我执行sudo apt update -y命令的输出：

$ sudo apt update -y
Hit:1 https://archive.ubuntu.petiak.ir/ubuntu noble InRelease
Hit:2 https://archive.ubuntu.petiak.ir/ubuntu noble-updates InRelease
Hit:3 https://archive.ubuntu.petiak.ir/ubuntu noble-backports InRelease
Hit:4 https://dl.google.com/linux/chrome/deb stable InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
19 packages can be upgraded. Run 'apt list --upgradable' to see them.
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://dl.google.com/linux/chrome/deb stable InRelease' doesn't support architecture 'i386'
N: Missing Signed-By in the sources.list(5) entry for 'https://archive.ubuntu.petiak.ir/ubuntu'
N: Missing Signed-By in the sources.list(5) entry for 'https://archive...

备注：内容来源于stack exchange，提问作者Toghrol