Fix bullseye repo

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
(cherry picked from commit 9a77b92)
Signed-off-by: Brian Goff <cpuguy83@gmail.com>

Author: cpuguy83

targets/linux/deb/debian/bullseye.go

@@ -33,7 +33,7 @@ var (
 					"backports.list": {
 						Inline: &dalec.SourceInline{
 							File: &dalec.SourceInlineFile{
-								Contents: "deb http://deb.debian.org/debian bullseye-backports main",
+								Contents: "deb http://archive.debian.org/debian bullseye-backports main",
 							},
 						},
 					},