fix: correct argument passing for multiprocessing in massage_task_within_subprocess (#302)

Author: recursix

browsergym/experiments/src/browsergym/experiments/benchmark/utils.py

@@ -260,7 +260,7 @@ def run_massage(outcome_queue: mp.Queue):
             outcome_queue.put(outcome)
 
     queue = mp.Queue()
-    process = mp.Process(target=run_massage, args=queue)
+    process = mp.Process(target=run_massage, args=(queue,))
     process.start()
     process.join(timeout=timeout)