Fix missing comma after theme argument

app.py

@@ -91,7 +91,7 @@ def predict(model, input_txt, unbiased, intr_threshold):
 demo = gr.Interface(
     theme=gr.themes.Default(
         primary_hue="yellow",
-    )
+    ),
     fn=predict,
     inputs=[
         gr.Dropdown(choices=MODELS, value=BAYES, label="Model"),