On Docker balenalib/raspberry-pi-debian the raspi.list points to ui repo

[MatteoR23]

I saw that on /etc/apt/sources.list.d/raspi.list we have the following:

deb http://archive.raspberrypi.org/debian bullseye main ui

The "ui" repository does not exists, so when I "apt update" a warning appears:

W: Skipping acquire of configured file 'ui/binary-armhf/Packages' as repository 'http://archive.raspberrypi.org/debian bullseye InRelease' doesn't have the component 'ui' (component misspelt in sources.list?)

Steps to reproduce:

docker pull balenalib/raspberry-pi-debian
docker run -dit --name RPI balenalib/raspberry-pi-debian /bin/bash
docker attach RPI

In docker's bash:

apt-get update