Thanks for your sharing.
Does this issue happen with other Jetpack version (e.g. 4.6.3)?
I could not reproduce this issue on my Xavier with Jetpack 5.0.2.
This looks like a warning about the repository. [trusted=yes] is used to turn off the GPG check.
i could not make an update with a missing release file without the said modification.
For additional info:
I didnt check for earlier versions of jetpack
i use a headless setup connected via ethernet to my laptop which is sharing the internet connection
i found this topic with comparable problem, but its for jetson nano r32.5.1:
To view the warning/error again i delete the [trusted=yes] out of my nvidia-l4t-apt-source.list and it works now without it. i cant figure out why it is working now though.