l10n: zh_CN: updated translation for 2.54

Translate 198 previously fuzzy or untranslated messages, bringing the
total number of translated messages to 6226.

Reviewed-by: 依云 <lilydjwg@gmail.com>
Reviewed-by: Fangyi Zhou <me@fangyi.io>
Signed-off-by: Jiang Xin <worldhello.net@gmail.com>

Author: jiangxin