Sampling rate for high quality model

[bagustris]

In this markdown file, TRAINING.md, the sampling rate of medium and high quality is the same (line 19 and 20). Is it a typo or really the same? If it is the same, what is the difference (in the training step)?

piper/TRAINING.md

Lines 17 to 20 in c0670df

	* The model "quality"
	* low = 16,000 Hz sample rate, [smaller voice model](https://github.com/rhasspy/piper/blob/master/src/python/piper_train/vits/config.py#L30)
	* medium = 22,050 Hz sample rate, [smaller voice model](https://github.com/rhasspy/piper/blob/master/src/python/piper_train/vits/config.py#L30)
	* high = 22,050 Hz sample rate, [larger voice model](https://github.com/rhasspy/piper/blob/master/src/python/piper_train/vits/config.py#L45)