fix workflow

climateqa/engine/graph.py

@@ -170,6 +170,7 @@ def make_graph_agent(llm, vectorstore_ipcc, vectorstore_graphs, reranker, thresh
     workflow.add_edge("answer_rag", END)
     workflow.add_edge("answer_rag_no_docs", END)
     workflow.add_edge("answer_chitchat", "chitchat_categorize_intent")
+    workflow.add_edge("retrieve_graphs_chitchat", END)
 
 
     # Compile