fix: mm tests (#570)

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## Changes

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svc/pkg/mm/worker/tests/lobby_closed_set.rs

@@ -2,7 +2,7 @@ use chirp_worker::prelude::*;
 use proto::backend::pkg::*;
 
 #[worker_test]
-async fn empty(ctx: TestCtx) {
+async fn lobby_closed_set(ctx: TestCtx) {
 	if !util::feature::job_run() {
 		return;
 	}

svc/pkg/mm/worker/tests/lobby_stop.rs

@@ -2,7 +2,7 @@ use chirp_worker::prelude::*;
 use proto::backend::{self, pkg::*};
 
 #[worker_test]
-async fn empty(ctx: TestCtx) {
+async fn lobby_stop(ctx: TestCtx) {
 	if !util::feature::job_run() {
 		return;
 	}