This bug was fixed in the package sbuild-launchpad-chroot - 0.16ubuntu0.20.04.1
--------------- sbuild-launchpad-chroot (0.16ubuntu0.20.04.1) focal; urgency=medium
* Fix updating of apt sources.list for focal and groovy chroots (LP: #1872163)
-- Chad Smith <email address hidden> Mon, 11 May 2020 17:33:46 -0600
This bug was fixed in the package sbuild- launchpad- chroot - 0.16ubuntu0.20.04.1
--------------- launchpad- chroot (0.16ubuntu0. 20.04.1) focal; urgency=medium
sbuild-
* Fix updating of apt sources.list for focal and groovy
chroots (LP: #1872163)
-- Chad Smith <email address hidden> Mon, 11 May 2020 17:33:46 -0600