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

Update to commit f347c9d2 ("filemap: make the accounting
of thrashing more consistent").

Commit 662ce1dc ("delayacct: track delays from write-protect copy").

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/798990521e991697f9f2b75f4dc4a485d31c1311.1670642548.git.siyanteng@loongson.cn


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