Saturated audio with Stable Audio

### Expected Behavior

A clear sound!

### Actual Behavior

Music or loud sound effects made with Stable Audio are heavily saturated.

### Steps to Reproduce

I tried with every sampler, scheduler, and CFG possible, the issue is still there but **I found a way to fix it.**

### Debug Logs

```powershell
/
```

### Other

In nodes_audio.py in the class VAEDecodeAudio.

We should normalize the audio when decoding by adding these lines or something similar:
max_amplitude = torch.max(torch.abs(audio))
if max_amplitude > 1.0:
audio = audio / max_amplitude

This fixes the audio clipping