Update app.py

app.py

@@ -256,7 +256,7 @@ css = """
 with gr.Blocks(css=css) as demo:
     gr.HTML(f"""
         <div style="text-align: center;">
-            <h2>TravelBench Environment</h2>
+            <h2>TravelPlanner Environment</h2>
         </div>
     """)
     gr.HTML("<hr>")