Fix some documentation links in torch.tensor (#17109)
Summary:
Currently it's broken https://pytorch.org/docs/stable/tensors.html#torch.Tensor.norm
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17109
Differential Revision: D14093567
Pulled By: ezyang
fbshipit-source-id: b167cde2150ee97ccf5689fcf50ff8157acfce10
