Update app.py

Use GradioNotebook in app.py

app.py

@@ -1,8 +1,8 @@
 import gradio as gr
-from gradio_gradioworkbook import GradioWorkbook
+from gradio_notebook import GradioNotebook
 
 AICONFIG_FILE_PATH = "./story_gen.aiconfig.json"
 with gr.Blocks() as demo:
-    GradioWorkbook(config_path=AICONFIG_FILE_PATH)
+    GradioNotebook(config_path=AICONFIG_FILE_PATH)
 
 demo.queue().launch()