l10n: zh_CN: for git v2.27.0 l10n round 1~2

Translate 73 new messages (4875t0f0u) for git 2.27.0.

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

Author: jiangxin