Update app.py

app.py

@@ -54,7 +54,7 @@ def create_qa_system():
         return RetrievalQA.from_chain_type(
             llm=llm,
             chain_type="stuff",
-            retriever=db.as_retriever(search_kwargs={"k": 2})
+            retriever=db.as_retriever(search_kwargs={"k": 2}))
     except Exception as e:
         raise gr.Error(f"Initialization failed: {str(e)}"))