fix: ci runs on v4

Jacky Zhao

2023-08-20 71471117c5ec4acdfc0b8335b4462ab43d86fce6

 content/index.md

@@ -13,7 +13,7 @@
```shell
git clone https://github.com/jackyzha0/quartz.git
cd quartz
git checkout v4-alpha
git checkout v4
npm i
npx quartz create
```