Tensor docs do not crosslink to other sections in dpctl site

[diptorupd]

The documentation should crosslink to other doc sections. E.g., the description of zeros should link the usm_ndarry string to https://intelpython.github.io/dpctl/latest/docfiles/dpctl/usm_ndarray.html#dpctl.tensor.usm_ndarray. Right now it is just italicizing the "usm_ndarray" word.

zeros()	Creates usm_ndarray with zero elements.

[diptorupd]

As an example where it is done correctly, please take a look at

asarray()	Converts obj to dpctl.tensor.usm_ndarray.