Update app.py

app.py

@@ -62,7 +62,7 @@ retriever = PineconeHybridSearchRetriever(
 )
 
 # Initialize LLM
-llm = ChatGroq(model="llama-3.1-8b-instant", temperature=0, max_tokens=1024, max_retries=2)
+llm = ChatGroq(model="llama-3.1-70b-versatile", temperature=0, max_tokens=1024, max_retries=2)
 
 # Contextualization prompt and retriever
 contextualize_q_system_prompt = """Given a chat history and the latest user question \