Merge pull request #25168 from tadfisher/ups-fix

ups: fix config generation

nixos/modules/services/monitoring/ups.nix

···
     };
 
     config = {
-      directives = mkHeader ([
+      directives = mkOrder 10 ([
         "driver = ${config.driver}"
         "port = ${config.port}"
         ''desc = "${config.description}"''