Update vector_store_retriever.py

vector_store_retriever.py

@@ -2,7 +2,7 @@ import json
 import os
 import gradio as gr
 import time
-from pydantic import BaseModel, Field
+from pydantic_settings import BaseSettings, validator
 from typing import Any, Optional, Dict, List
 from huggingface_hub import InferenceClient
 from langchain.llms.base import LLM