Update app.py

reduce similarity cut off to 0.7

app.py

@@ -115,7 +115,7 @@ async def run_function_on_text(top_k, study_obj, study_type, phase, purpose, all
     similarity_top_k=top_k,
     citation_chunk_size=2048,
     verbose=True,
-    node_postprocessors=[SimilarityPostprocessor(similarity_cutoff=0.8)],
+    node_postprocessors=[SimilarityPostprocessor(similarity_cutoff=0.7)],
     use_async=True
     )