Fix spelling mistakes in Documentation/zh_CN/SubmittingPatches

This patch fixes a spelling mistake in Documentation/zh_CN/SubmittingPatches.

Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com>
Signed-off-by: Harry Wei <harryxiyou@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>