Touch up markdown

app.py

@@ -552,7 +552,13 @@ def process_file(file):
     return f"Error: {str(e)}"
 
 with gr.Blocks(head=_CSS, ) as demo:
-  gr.Markdown("## TensorFlow Lite Model Visualizer")
+  gr.Markdown(
+"""
+## TensorFlow Lite Model Visualizer
+
+Drag and drop your `.tflite`, `.bin` or `.tf_lite` model files below to analyze them.
+
+""")
   file_input = gr.File(label="Upload TFLite File")
   html_output = gr.HTML(label="Generated HTML", container=True)
   file_input.change(process_file, inputs=file_input, outputs=html_output)