Add new translation
  Documentation/translations/zh_CN/doc-guide/index.rst

Signed-off-by: Wu XiangCheng <bobwxc@email.cn>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Link: https://lore.kernel.org/r/4a01400c3d65b2f7eb1c1bebd3a0e102ed29208f.1618295149.git.bobwxc@email.cn


Signed-off-by: Jonathan Corbet <corbet@lwn.net>