docs/zh_CN: core-api: Update the translation of printk-format.rst to 5.19-rc3

Synchronous translation from upstream commit 6a7ca80f
("vsprintf: Update %pGp documentation about that it prints hex value")

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
Reviewed-by: Yanteng <Si&lt;siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/2ba15ab2aa46bfdd400d1c043eecc12bc6154836.1655863769.git.zhoubinbin@loongson.cn


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