l10n: zh_CN: for git v2.33.0 l10n round 2

Translate 48 new messages (5230t0f0u) for git 2.33.0, and also fixed
typos found by "git-po-helper".

Signed-off-by: Jiang Xin <[email protected]>
Signed-off-by: Fangyi Zhou <[email protected]>

Author: jiangxin