fix missing close string

app.py

@@ -361,7 +361,7 @@ class InferenceNodeGenerator(NodeGenerator):
         "text2text-generation": {"generated_text": ("str", "gr.Textbox(label='Output')")},
         "summarization": {"summary": ("str", "gr.Textbox(label='Summary')")},
         "translation": {"translation": ("str", "gr.Textbox(label='Translation')")},
-        "question-answering": {"answer": ("str", "gr.Textbox(label='Answer'))},
+        "question-answering": {"answer": ("str", "gr.Textbox(label='Answer')")},
         "image-classification": {"labels": ("list", "gr.JSON(label='Predictions')")},
         "object-detection": {"objects": ("list", "gr.JSON(label='Detections')")},
         "image-segmentation": {"masks": ("list", "gr.JSON(label='Segments')")},
@@ -369,7 +369,7 @@ class InferenceNodeGenerator(NodeGenerator):
         "image-to-text": {"text": ("str", "gr.Textbox(label='Description')")},
         "automatic-speech-recognition": {"text": ("str", "gr.Textbox(label='Transcription')")},
         "text-to-speech": {"audio": ("filepath", "gr.Audio(label='Generated Audio')")},
-        "zero-shot-classification": {"scores": ("list", "gr.JSON(label='Scores'))},
+        "zero-shot-classification": {"scores": ("list", "gr.JSON(label='Scores')")},
     }
     
     def get_model_info(self, model_id: str) -> Optional[Dict]: