[docs] Bad URLs on the about page

[jonathanyeong]

All the links on the about page do not load in chrome. It seems like this issue is isolated to chromium browsers. It works in safari and firefox.

Tested on Chrome 128.0.6613.85

I noticed this comment:

  // TODO: Fix trailing slashes throughout the docs
  // trailingSlash: 'always',

Should we be adding trailing slashes to all URLs? I'm happy to do it. But wondering if that's the direction tauri docs want to go.