docs: update sphinx.rst to reflect the default theme change

We don't default to Read The Docs anymore; update the docs to match.

Acked-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2022-09-27 10:41:15 -06:00
commit 26d797ffc1