Update app.py

app.py

@@ -68,7 +68,7 @@ llm = HuggingFaceEndpoint(
     repetition_penalty=1.03,
 )
 
-chat_model = ChatHuggingFace(llm=llm)
+chat= ChatHuggingFace(llm=llm)
 
 str_output_parser = StrOutputParser()