nas plasma6, dont enable sddm by default

hosts/nas/configuration.nix

@@ -9,6 +9,7 @@ let
     "$y$j9T$EkPXmsmIMFFZ.WRrBYCxS1$P0kwo6e4.WM5DsqUcEqWC3MrZp5KfCjxffraMFZWu06";
   hostname = "jallen-nas";
   allowedPorts = [ 2342 61208 ];
+  enableDisplayManager = false;
 in {
   imports = [ # Include the results of the hardware scan.
     ./hardware-configuration.nix
@@ -163,13 +164,13 @@ in {
     # Enable the X11 windowing system.
     xserver = {
       enable = true;
-      
+
       # Enable the Plasma 6 Desktop Environment.
       displayManager = {
-        sddm.enable = true;
+        sddm.enable = enableDisplayManager;
         defaultSession = "plasmawayland";
       };
-      desktopManager.plasma5.enable = true;
+      desktopManager.plasma6.enable = true;
     };
 
     # Set to enable Flatpak