Add lanzaboote

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/nix-install/install.completion.zsh

@@ -4,6 +4,7 @@ _nix-install_completion() {
     '-m[Mode: 'install' or 'repair']:mode:(install repair)'
     '-h[Host to configure]:host:($(_list_hosts))'
     '-k[Key file to copy to user config]:key:($(_list_keys))'
+    '-s[Enroll secure boot keys on current device]'
     '-c[Copy configuration to target]'
     '-r[Reboot after completion]'
   )