feat: integrate zeroGPU decorator for inference and render functions

app.py

@@ -1,3 +1,4 @@
+import spaces
 import gradio as gr
 import numpy as np
 from scipy.io.wavfile import read
@@ -237,6 +238,7 @@ def convert2float(sr: int, x: np.ndarray) -> np.ndarray:
     return x
 
 
+@spaces.GPU(duration=60)
 def inference(
     input_audio,
     ref_audio,
@@ -318,6 +320,7 @@ def inference(
     return vec
 
 
+@spaces.GPU(duration=10)
 def render(y, remove_approx, ratio, vec):
     device = environ.get("DEVICE", "cpu")
     y = convert2float(*y)