fix argument passing to function

app.py

@@ -147,7 +147,7 @@ def retriever(query: str, selected_retriever: str):
     # You could return retrieved info here.
     return corpus
 
-def reasoner(query: str, documents: list[str], llm_client: Any):
+def reasoner(query: str, documents: list[str], selected_reasoner: str, llm_client: Any):
     """Simulate a 'reasoner' step, thinking about how to answer."""
     with st.chat_message("assistant"):
         placeholder = st.empty()
@@ -263,7 +263,7 @@ def main():
             st.markdown(display_message)
 
         retrieved_documents = retriever(prompt, selected_retriever)
-        reasoning, decision = reasoner(prompt, retrieved_documents, llm_client)
+        reasoning, decision = reasoner(prompt, retrieved_documents, selected_reasoner, llm_client)
 
         # Display assistant response in chat message container
         with st.chat_message("assistant"):