Update app.py

Actually setting a return

app.py

@@ -2,7 +2,7 @@ import gradio as gr
 
 def run_query(query_string: str):
     meal_string = f"Oh you want {query_string}. Go have a think yourself then."
-    pass
+    return meal_string
 
 with gr.Blocks() as meal_search:
     gr.Markdown("Start typing below and then click **Run** to see the output.")