Update app.py

app.py

@@ -72,7 +72,7 @@ class TranslationOrchestrator:
 
             name = os.getenv(name_key, f"Worker {worker_index}")
             priority = int(os.getenv(f"WORKER_{worker_index}_PRIORITY", "1"))
-            max_concurrent = int(os.getenv(f"WORKER_{worker_index}_MAX_CONCURRENT", "3"))
+            max_concurrent = int(os.getenv(f"WORKER_{worker_index}_MAX_CONCURRENT", "1"))
 
             worker_id = f"worker_{worker_index}"
             config = WorkerConfig(