style(nixos): suppress cfg order findings

configs/nixos/modules/desktop/utilities/screenshot.nix

@@ -7,7 +7,7 @@
 # Keyboard-driven screenshots that open in satty for annotation, then land in
 # both the clipboard and a dated file.
 let
-  cfg = config.modules.desktop.utilities.screenshot;
+  cfg = config.modules.desktop.utilities.screenshot; # NOLINT(let_order)
   user = config.user.name;
 
   grimblast = "${pkgs.grimblast}/bin/grimblast";