Also don't restart the service should it be running during a config update

nixos/modules/monitoring/exporters/tahoe.nix

@@ -45,6 +45,7 @@ in {
         after = [ "tahoe.storage.service" ];
         startAt = cfg.interval;
         path = [ pkgs.curl ];
+        restartIfChanged = false;
 
         # Save to a temp file and then move atomically so the
         # textfile collector won't read a partial file.