docs/zh_CN: update git command examples in how-to.rst

This patch leverages `checkout -b` to shorten branch & checkout
and fix the missing checkout.

Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn>
Acked-by: Yanteng Si <si.yanteng@linux.dev>
Signed-off-by: Alex Shi <alexs@kernel.org>
This commit is contained in:
Dongliang Mu 2025-06-18 20:53:10 +08:00 • committed by Alex Shi
commit 31df8330ee