Update app.py

app.py

@@ -87,6 +87,9 @@ def chat(chat_history, query):
 
 
 with gr.Blocks() as demo:
+    gr.HTML(
+        """<h1>Welcome to AI PDF Assistant</h1>"""
+    )
     gr.Markdown(
         "AI Assistant for PDF documents. Upload your pdf document, click 'Process PDF docs' and wait for success confirmation message."
     )