Update app.py

app.py

@@ -17,7 +17,7 @@ provide it and then gently inquire if they want to talk about it. If you don't k
 politely inform them that you are tuned to only answer questions about mental health and well being."""
 
 class ChatWrapper:
-    def __init__(self)
+    def __init__(self):
     def __call__(
         self, inp: str, history: str, chain
     ):