Update app.py

app.py

@@ -69,7 +69,7 @@ def retrieval_qa_chain(llm,prompt,db):
     qa_chain = RetrievalQA.from_chain_type(
         llm = llm,
         chain_type = 'stuff',
-        retriever = db.as_retriever(search_type = 'similarity',search_kwargs = {'k': 3}),
+        retriever = db.as_retriever(search_type = 'similarity',search_kwargs = {'k': 2}),
         return_source_documents = True,
         chain_type_kwargs = {'prompt': prompt}
     )