Fix default argument in predict function

app.py

@@ -1,6 +1,6 @@
 import gradio as gr
 
-def predict(model="spam-rate", input_txt):
+def predict(model, input_txt):
     return 0.46  # Worldwide spam rate in 2023. Source: https://securelist.com/spam-phishing-report-2023/112015/
 
 demo = gr.Interface(