Action needed: add RTD redirects for merge of pyproject.toml specs

[jeanas]

Reposting #1396 (comment) for visibility.

Following the merge of #1396, two redirects need to be added in the ReadTheDocs Web UI:

https://packaging.python.org/en/latest/specifications/declaring-build-dependencies/ → https://packaging.python.org/en/latest/specifications/pyproject-toml/

https://packaging.python.org/en/latest/specifications/declaring-project-metadata/ → https://packaging.python.org/en/latest/specifications/pyproject-toml/

(This will be less clumsy when #1408 is done, then PRs removing documents can add the redirects at the same time...)

[jeanas]

Who actually has RTD admin access?

[jeanas]

I see now that this is visible on https://readthedocs.org/projects/python-packaging-user-guide/ .

@webknjaz @dstufft @ewdurbin @di Could any of you take a look please?

[ewdurbin]

Done.

[jeanas]

Thanks!