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

Update to commit 20549801 ("Docs/admin-guide/damon/reclaim:
remove a paragraph that been obsolete due to online tuning support")

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/6f85da692baee63696e2680d5dd57c158bfbe0a6.1670642548.git.siyanteng@loongson.cn


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