increase concurrency

app.py

@@ -22,5 +22,5 @@ if __name__ == "__main__":
         greet_btn = gr.Button("Generate slides")
         greet_btn.click(fn=func, inputs=[file, number_of_pages], outputs=output, api_name="greet")
     
-    demo.queue(max_size=10)
+    demo.queue(default_concurrency_limit=2, max_size=5)
     demo.launch(auth=check_password)