doc: fix fake quantize per channel doc (#105955)
another doc bug for fake_quantize_per_channel
function doc now matches https://github.com/pytorch/pytorch/blob/e7142700ede35bc0e8520b9fc9572f4a09672830/aten/src/ATen/native/quantized/FakeQuantPerChannelAffine.cpp#L32
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105955
Approved by: https://github.com/kit1980
