vuepress 采用多页面形式，每个md文件在打包时，都会被转为一个html页面；而浏览器默认会缓存页面，导致更新的页面必须手动刷新才行

对于更新较为频繁的文档

• 全局可在config.js里设置

参考文档:
https://vuepress.github.io/zh/reference/config.html#head
https://vuepress.github.io/zh/reference/frontmatter.html#description

export default defineUserConfig({...head: [["meta", {"http-equiv": "Pragma", content: "no-cache"}],["meta", {"http-equiv": "Cache-Control", content: "no-cache"}],["meta", {"http-equiv": "Expires", content: "0"}]],
})

• 单页面可以按Frontmatter语法要求在相应md文件设置

---
head:- - meta- http-equiv: Pragmacontent: no-cache- http-equiv: Cache-Controlcontent: no-cache- http-equiv: Expirescontent: 0
---