MAINTAINERS: SOFTWARE RAID: Add Yu Kuai as Reviewer

Add Yu Kuai as reviewer for md/raid subsystem.
Signed-off-by: Song Liu <song@kernel.org>
Acked-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20231128035807.3191738-1-song@kernel.org

MAINTAINERS

@@ -20106,6 +20106,7 @@ F:	include/linux/property.h
 
 SOFTWARE RAID (Multiple Disks) SUPPORT
 M:	Song Liu <song@kernel.org>
+R:	Yu Kuai <yukuai3@huawei.com>
 L:	linux-raid@vger.kernel.org
 S:	Supported
 Q:	https://patchwork.kernel.org/project/linux-raid/list/