Bug#1059957: debian-installer: please make the netboot fw.img.gz files reproducible

[James Addison]

Source: debian-installer
Followup-For: Bug #1059957
Control: forwarded -1 
https://salsa.debian.org/installer-team/debian-installer/-/commit/a6de557a1e14e4fac82fdb47478864d3e9b6185f
Control: fixed -1 20260628
Control: close -1