Update app.py with advanced migration options

app.py

@@ -161,7 +161,9 @@ with gr.Blocks(theme=gr.themes.Base()) as demo:
     gr.Markdown("### Location of existing dataset")
     gr.Markdown("URL for the GitHub repository where the dataset is currently hosted")
     source_github_repository = gr.Textbox(lines=1, label="Source GitHub Repository URL")
-    gr.Markdown("Use advanced options to select specific files and folders to migrate.")
+    gr.Markdown(
+        "Use advanced options to select specific files and folders to migrate. Currently this app supports migrating specific subfolder(s) or top level files. If this is not sufficient for your use case please open a discussion!"
+    )
     with gr.Accordion("Advanced Options", open=False):
         gr.Markdown("### Select files and folder to migrate")
         gr.Markdown(