sysfs docs: ABI: Fix typo in comment

Fix typo in the comment

Signed-off-by: Slark Xiao <slark_xiao@163.com>
Link: https://lore.kernel.org/r/20220721020623.20974-1-slark_xiao@163.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>