Update rag_langgraph.py

rag_langgraph.py

@@ -106,8 +106,8 @@ def create_graph(topic, word_count):
     writer_node = functools.partial(agent_node, agent=writer_agent, name="Writer")
 
     workflow = StateGraph(AgentState)
-    workflow.add_node("Researcher", research_node)
-    workflow.add_node("Writer", research_node)
+    workflow.add_node("Researcher", researcher_node)
+    workflow.add_node("Writer", writer_node)
     workflow.add_node("Manager", supervisor_chain)
 
     for member in members: