mlapis.ipynb speech-to-text doesn't work

The speech-to-text cell doesn't work with the `v1beta1` version. Also the the parameters in the config have changed. I adapted the code as shown below, this works for me.

```
sservice = build('speech', 'v1', developerKey=APIKEY)
response = sservice.speech().recognize(
body={
'config': {
'encoding': 'LINEAR16',
'sample_rate_hertz': 16000,
'language_code':'en-US'
},
'audio': {
'uri': 'gs://cloud-training-demos/vision/audio.raw'
}
}).execute()
print(response)
```

Please change for a more smooth experience while doing the training.

Thanks in advance.