DOC: Documentation for pymc.math.concatenate refers to `join` which is not documented.

Issue with current documentation:

https://www.pymc.io/projects/docs/en/stable/api/generated/pymc.math.concatenate.html which is based on the docstring for pytensor.math.concatenate says :

Alias for `join`(axis, *tensor_list).

This function is similar to `join`, but uses the signature of
numpy's concatenate function.

This is not very helpful, because join is not documented as far as I can determine.

Idea or request for content:

I suggest instead that the docstring be based on the documentation at
https://pytensor.readthedocs.io/en/latest/library/tensor/basic.html#pytensor.tensor.concatenate

Search the PyTensor source for the pymc.math.concatenate or pytensor.math.concatenate docstring, then compare its current description with the linked PyTensor concatenate documentation. Update the documentation so it explains the function without relying on the undocumented join reference, and verify that the generated API page reflects the revised text.