Update app.py

app.py

@@ -85,7 +85,7 @@ query_engine_get_study = CitationQueryEngine.from_args(
     similarity_top_k=5,
     citation_chunk_size=2048,
     node_postprocessors=[SimilarityPostprocessor(similarity_cutoff=0.8)],
-    use_async=True    
+    use_async=True,    
     verbose=True,
 )