Update app.py

app.py

@@ -8,7 +8,7 @@ from haystack.nodes import EmbeddingRetriever
 from haystack import Pipeline
 import numpy as np
 import pandas as pd
-from haystack.document_stores import FAISSDocumentStore
+from haystack.document_stores import FAISSDocumentStore, PineconeDocumentStore
 from haystack.nodes import EmbeddingRetriever
 from haystack.schema import Document
 from huggingface_hub import login, HfApi, hf_hub_download, InferenceClient