/usr/share/budgie-desktop/keycontrol/custom-keys.d/gnome-screenshot.dconf is in budgie-desktop-environment 0.9.9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [custom-keybindings/budgie-screenshot]
binding='Print'
command='gnome-screenshot'
name='Save a screenshot to Pictures'
|