Update app.py

app.py

@@ -5,7 +5,7 @@ from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_community.embeddings.fastembed import FastEmbedEmbeddings
 from langchain_community.vectorstores import FAISS
 from langchain_huggingface import HuggingFaceEndpoint
-from langchain.prompts import ChatPromptTemplate
+from langchain_core.prompts import ChatPromptTemplate
 
 # --- 1. Model Setup using HF Inference API ---
 # Get the HF token from environment variables (set in Space secrets)