nixos/readeck: add back MemoryDenyWriteExecute

SQLite driver is reverted to its CGO version so this can be enabled

nixos/modules/services/web-apps/readeck.nix

@@ -69,6 +69,7 @@ in
         ExecStart = "${lib.getExe cfg.package} serve -config ${configFile}";
         ProtectSystem = "full";
         SystemCallArchitectures = "native";
+        MemoryDenyWriteExecute = true;
         NoNewPrivileges = true;
         PrivateTmp = true;
         PrivateDevices = true;