docs/zh_CN: Update the translation of page_owner to 6.1-rc8

Update to commit 0719fdba ("Documentation/mm/page_owner.rst:
delete frequently changing experimental data").

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/f7a7b03a09a184c080f804d9bb89d0cc55750900.1670642548.git.siyanteng@loongson.cn


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