fix linting

examples/lightrag_nvidia_demo.py

@@ -97,6 +97,7 @@ async def test_funcs():
 
 # asyncio.run(test_funcs())
 
+
 async def initialize_rag():
     embedding_dimension = await get_embedding_dim()
     print(f"Detected embedding dimension: {embedding_dimension}")
@@ -117,8 +118,10 @@ async def initialize_rag():
 
     await rag.initialize_storages()
     await initialize_pipeline_status()
-    
+
     return rag
+
+
 async def main():
     try:
         # Initialize RAG instance