sudo to attach-disk command

Author: jaysa68

docs/staff-docs/procedures/staff-vms.md

@@ -64,7 +64,7 @@ Destroy:
  When trying to provision a NixOS VM through ISO (after step 3.), we ran into an issue where no bootable option or device was found.
 The way to solve this was to attach the ISO first:
 
-`virsh attach-disk [domain name] /var/lib/libvirt/images/latest-nixos-minimal-x86_64-linux.iso sda --driver qemu --type cdrom`
+`sudo virsh attach-disk [domain name] /var/lib/libvirt/images/latest-nixos-minimal-x86_64-linux.iso sda --driver qemu --type cdrom`
 
 Then disable secure boot in BIOs and add "console=ttys0" to the bootloader screen by pressing "e" and appending the parameter.