Fix example by switching to "enhance_batch" (#3)

- Fix example by switching to "enhance_batch" (9c8d29ed708148065d2ecb2d6a063274c60a2759)

README.md

@@ -67,10 +67,13 @@ enhance_model = SpectralMaskEnhancement.from_hparams(
     source="speechbrain/mtl-mimic-voicebank",
     savedir="pretrained_models/mtl-mimic-voicebank",
 )
-enhanced = enhance_model.enhance_file("speechbrain/mtl-mimic-voicebank/example.wav")
+noisy = enhance_model.load_audio("speechbrain/mtl-mimic-voicebank/example.wav")
+
+# Add batch dimension and enhance
+enhanced = enhance_model.enhance_batch(noisy.unsqueeze(0))
 
 # Saving enhanced signal on disk
-torchaudio.save('enhanced.wav', enhanced.unsqueeze(0).cpu(), 16000)
+torchaudio.save('enhanced.wav', enhanced.cpu(), 16000)
 ```
 
 The system is trained with recordings sampled at 16kHz (single channel).