Update index_retriever.py

index_retriever.py

@@ -77,12 +77,12 @@ def create_query_engine(vector_index):
         vector_retriever = VectorIndexRetriever(
             index=vector_index, 
             similarity_top_k=70,
-            similarity_cutoff=0.45
+            similarity_cutoff=0.55
         )
         
         hybrid_retriever = QueryFusionRetriever(
             [vector_retriever, bm25_retriever],
-            similarity_top_k=100,
+            similarity_top_k=140,
             num_queries=1
         )