[LTP] [PATCH] doc: fix documentation build with latest setuptools

[Cyril Hrubis]

Hi!
> Force setuptools to version 81.0.0, which is the last one where linuxdoc
> still can be installed. Also, from python 3.12 setuptools is not
> available anymore when creating a new virtualenv, so we need to force
> its installation to ensure that documentation will be built.

Acked-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz