fix: yield a list

app.py

@@ -12,14 +12,14 @@ def respond(
     top_p: float,
     top_k: int
 ):
-    yield pipe(
+    yield [pipe(
         message,
         max_new_tokens=max_new_tokens,
         do_sample=True,
         temperature=temperature,
         top_p=top_p,
         top_k=top_k
-    )['generated_text']
+    )['generated_text']]
 
 
 """