MAINTAINERS: Update Li Nan's E-mail address

Change to my new email address on didiglobal.com.

Signed-off-by: Li Nan <magiclinan@didiglobal.com>
Link: https://patch.msgid.link/tencent_8F8173BEDF20E98550D5429DF802F34A7108@qq.com
Signed-off-by: Yu Kuai <yukuai@fygo.io>

Author: Li Nan

MAINTAINERS

@@ -24797,7 +24797,7 @@ F:	include/linux/property.h
 SOFTWARE RAID (Multiple Disks) SUPPORT
 M:	Song Liu <song@kernel.org>
 M:	Yu Kuai <yukuai@fygo.io>
-R:	Li Nan <linan122@huawei.com>
+R:	Li Nan <magiclinan@didiglobal.com>
 R:	Xiao Ni <xiao@kernel.org>
 L:	linux-raid@vger.kernel.org
 S:	Supported