Update app.py

app.py

@@ -256,6 +256,7 @@ custom_css="""
 with gr.Blocks(css=custom_css, theme=app_theme) as main_interface:
     with gr.Column(elem_id="col-container"):
         gr.Markdown("# **SAM3: Segment Anything Model 3**", elem_id="main-title")
+        gr.Markdown("Segment objects in image or video using **SAM3** (Segment Anything Model 3) with text prompts.")
 
         with gr.Tabs():
             with gr.Tab("Image Segmentation"):