Different order of (estimates, reference) in SISDR Loss forward

[seastar105]

while other metrics accept (estimates, reference) in function call, SISDR takes (reference, estimates) in function call which makes confusing and easy-to-mistake. need change!

audiotools/audiotools/metrics/distance.py

Lines 83 to 91 in 49b8b6b

	def forward(self, x: AudioSignal, y: AudioSignal):
	eps = 1e-8
	# nb, nc, nt
	if isinstance(x, AudioSignal):
	references = x.audio_data
	estimates = y.audio_data
	else:
	references = x
	estimates = y