Update links on vue.js

[rhues]

This page still refers to the old vite-plugin-ssr page, and it should be updated to refer to vike.dev.

https://vuejs.org/guide/scaling-up/ssr.html

[brillout]

👍 Let me make a PR.

[brillout]

Actually, I think it's best we make a proper PR a little later. Let's first revamp the landing page and finish polishing vike-vue. We'll then have a shot to also plug Vike into other sections.