fixed minor error

app.py

@@ -43,7 +43,7 @@ demo = gr.Interface(
     description="Insert passenger class, age, number of sibilings/spouse on board of the Titanic, number of parents/children on board of the Titanic, fare, sex, port of embarkation and see if he/she survived ",
     allow_flagging="never",
     inputs=[
-        gr.inputs.Radio(choices=["First Class", "Second Class", "Third Class", label="Passenger Class"),
+        gr.inputs.Radio(choices=["First Class", "Second Class", "Third Class"], label="Passenger Class"),
         gr.inputs.Number(default=20, label="Age"),
         gr.inputs.Number(default=1.0, label="Number of sibilings/spouse on board of the Titanic"),
         gr.inputs.Number(default=1.0, label="Number of parents/children on board of the Titanic"),