Documentation: KVM: fix typos in running-nested-guests.rst

change "gues" to "guest" and remove redundant ")".

Signed-off-by: Wang Yong <yongw.kernel@gmail.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
Link: https://lore.kernel.org/r/20230110150046.549755-1-yongw.kernel@gmail.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>