Update app.py

app.py

@@ -125,8 +125,7 @@ def invoke(openai_api_key, rag_option, prompt):
         raise gr.Error("Retrieval Augmented Generation is required.")
     if (prompt == ""):
         raise gr.Error("Prompt is required.")
-    config.rag_option = rag_option
-    config.update(allow_val_change = True)
+    wandb.config[rag_option] = rag_option
     try:
         llm = ChatOpenAI(model_name = config.model, 
                          openai_api_key = openai_api_key,