fix typo

app.py

@@ -174,7 +174,7 @@ with gr.Blocks(css=css) as demo:
         This is a very useful tool in probability theory and is used in many real-world applications.
 
         ## The Monty Hall problem
-        he Monty Hall problem is a famous probability puzzle that shows how counterintuitive probability can be. It is also a good illustration of we can decompose a complex probability into simple ones using `conditional probability` and the `law of total probability`.
+        The Monty Hall problem is a famous probability puzzle that shows how counterintuitive probability can be. It is also a good illustration of we can decompose a complex probability into simple ones using `conditional probability` and the `law of total probability`.
         
         The problem is as follows:
         - You are a contestant on the show and are presented with `three doors`.