code update for duration of ZeroGPU

tts/gradio_api.py

@@ -20,6 +20,8 @@ import gradio as gr
 import traceback
 from tts.infer_cli import MegaTTS3DiTInfer, convert_to_wav, cut_wav
 
+import spaces
+
 os.system('huggingface-cli download ByteDance/MegaTTS3 --local-dir ./checkpoints --repo-type model')
 CUDA_AVAILABLE = torch.cuda.is_available()
 infer_pipe = MegaTTS3DiTInfer(device='cuda' if CUDA_AVAILABLE else 'cpu')