Update app.py

app.py

@@ -116,7 +116,7 @@ ensemble_retriever = EnsembleRetriever(
         vectorstore.as_retriever(search_kwargs={"k": 5}),
         bm25_retriever
     ],
-    weights=[0.9, 0.1]
+    weights=[1.0, 0.0]
 )
 retriever = ensemble_retriever