Fix typo

nixos/modules/monitoring/exporters/node.nix

@@ -16,7 +16,7 @@ let
 
 in {
   options.services.private-storage.monitoring.exporters.node = {
-    enable = lib.mkEnableOption "Base sytsem metrics collection";
+    enable = lib.mkEnableOption "Base system metrics collection";
     textfiles-directory = lib.mkOption {
       type = lib.types.str;
       description = "Directory used by the textfiles collector.";