l10n: zh_CN: for git v2.29.0 l10n round 1 and 2

Translate 124 new messages (5013t0f0u) for git 2.29.0.

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