Update rag_api.py

rag_api.py

@@ -6,7 +6,8 @@ from fastapi import FastAPI
 from pydantic import BaseModel
 from langchain_huggingface import HuggingFaceEmbeddings
 # from langchain_community.chains import RetrievalQA
-from langchain.schema.runnable import RunnablePassthrough
+# from langchain.schema.runnable import RunnablePassthrough
+from langchain_core.runnables import RunnablePassthrough
 from langchain.prompts import PromptTemplate
 from langchain_groq import ChatGroq