temp fix : reranker switch to nano

app.py

@@ -80,7 +80,7 @@ llm = get_llm(provider="openai", max_tokens=1024, temperature=0.0)
 if os.environ["GRADIO_ENV"] == "local":
     reranker = get_reranker("nano")
 else:
-    reranker = get_reranker("large")
+    reranker = get_reranker("nano")
 
 agent = make_graph_agent(
     llm=llm,