Update app.py

app.py

@@ -13,6 +13,7 @@ from qdrant_client import QdrantClient, models
 from fastembed.sparse.splade_pp import supported_splade_models
 from fastembed import SparseTextEmbedding, SparseEmbedding
 from langchain_community.chat_models.ollama import ChatOllama
+from langchain_huggingface import HuggingFacePipeline
 from langchain_core.callbacks import CallbackManager, StreamingStdOutCallbackHandler
 from fastembed_ext import FastEmbedEmbeddingsLc
 from langchain_community.document_loaders.wikipedia import WikipediaLoader