renamed ai/index.nix to ai/default.nix

hosts/desktop/configuration.nix

@@ -4,7 +4,7 @@
 		[ # Include the results of the hardware scan.
 		./hardware-configuration.nix
 		../../modules/nixos/localization.nix
-		../../modules/nixos/ai/index.nix
+		../../modules/nixos/ai/default.nix
 		../../modules/nixos/desktops/gnome.nix
 		../../modules/nixos/desktops/hyprland.nix
 		];