docs: translations/zh_CN: fix a typo at 8.Conclusion.rst

transaltions -> translations

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/40b3d5c983fb06d8a58d1f613c175a98e0631677.1621413933.git.mchehab+huawei@kernel.org


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