feat: increase concurrency count

app.py

@@ -676,4 +676,4 @@ if __name__ == '__main__':
                                 tts_voice
                             ]
                         )
-        app.queue(concurrency_count=1, max_size=20, api_open=config.api).launch(share=config.colab)
+        app.queue(concurrency_count=5, max_size=50, api_open=config.api).launch(share=config.colab)