MAINTAINERS: Update LTP members and web

LTP project uses now readthedocs.org instance instead of GitHub wiki.

LTP maintainers are listed in alphabetical order.

Link: https://lkml.kernel.org/r/20240726072009.1021599-1-pvorel@suse.cz


Signed-off-by: Petr Vorel <pvorel@suse.cz>
Reviewed-by: Li Wang <liwang@redhat.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Cc: Jan Stancek <jstancek@redhat.com>
Cc: Xiao Yang <yangx.jy@fujitsu.com>
Cc: Yang Xu <xuyang2018.jy@fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>