Docs(build): linklint is now called sphinx_linklint (#156373)

* Docs(build): linklint is now called sphinx_linklint

* Docs(build): move the lock command to the Makefile

* Update Doc/Makefile

Co-authored-by: Stan Ulbrych <stan@python.org>

* Add a comment clarify cooldown (and excludes) and add to `make help`

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Co-authored-by: Stan Ulbrych <stan@python.org>
4 files changed