Fix lintings in examples folder

examples/lightrag_ollama_demo.py

@@ -1,7 +1,6 @@
 import asyncio
 import nest_asyncio
 
-nest_asyncio.apply()
 import os
 import inspect
 import logging
@@ -10,6 +9,8 @@ from lightrag.llm.ollama import ollama_model_complete, ollama_embed
 from lightrag.utils import EmbeddingFunc
 from lightrag.kg.shared_storage import initialize_pipeline_status
 
+nest_asyncio.apply()
+
 WORKING_DIR = "./dickens"
 
 logging.basicConfig(format="%(levelname)s:%(message)s", level=logging.INFO)