add a welcome message to the Gradio_UI

Gradio_UI.py

@@ -262,6 +262,7 @@ class GradioUI:
         import gradio as gr
 
         with gr.Blocks(fill_height=True) as demo:
+            gradio.Label("Wecome to my first smolagent! You can use tools to get the time in a given location.")
             stored_messages = gr.State([])
             file_uploads_log = gr.State([])
             chatbot = gr.Chatbot(