Add concurrency limit to allow multiple users to use at once, reduce queue times

app.py

@@ -217,7 +217,7 @@ def sadtalker_demo():
 if __name__ == "__main__":
 
     demo = sadtalker_demo()
-    demo.queue(max_size=10)
+    demo.queue(max_size=10, default_concurrency_limit=5)
     demo.launch(debug=True)