Fix GPU decorator usage in run_inference_gpu function

app.py

@@ -226,7 +226,7 @@ def infer_tc7(audio, nps, bpm, offset, difficulty, level, DEVICE, MODEL):
     return oni_audio, plot, tja_content
 
 
-@spaces.GPU
+@spaces.GPU()
 def run_inference_gpu(audio, model_choice, nps, bpm, offset, difficulty, level):
     if model_choice == "TC5":
         return infer_tc5(audio, nps, bpm, offset, GPU_DEVICE, tc5)