add Optional to HF token prompt

app.py

@@ -347,7 +347,7 @@ with gr.Blocks() as demo:
         with gr.Column(scale=4):
             url = gr.Textbox(label="Enter YouTube video URL here:",placeholder="https://www.youtube.com/watch?v=")
         with gr.Column(scale=1):
-            api_token = gr.Textbox(label="Paste your Hugging Face API token here:",placeholder="hf_...",visible=True,show_label=True,info='The API token passed via this field is not stored. It is only passed through the Hugging Face Hub API for inference.')
+            api_token = gr.Textbox(label="Paste your Hugging Face API token here (Optional):",placeholder="hf_...",visible=True,show_label=True,info='The API token passed via this field is not stored. It is only passed through the Hugging Face Hub API for inference.')
         with gr.Column(scale=1):
             sum_btn = gr.Button("Summarize!")