fix: put quotations around font

Jacky Zhao

2023-08-20 96a3bfeafbe3e46bdf3e217dd934b026bc1b9f9f

 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
```