/usr/share/kconf_update/fonts_global.upd is in plasma-integration 5.8.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | Version=5
Id=Fonts_Global
Options=overwrite
File=kdeglobals
Script=fonts_global.pl,perl
|