Click on new button on bottom break the routes

[omkargarde]

when click on quick start button from https://tanstack.com/start/latest/docs/framework/react/getting-started
navigates to https://tanstack.com/start/latest/docs/framework/react/getting-started/framework/react/quick-start
rather than https://tanstack.com/start/latest/docs/framework/react/getting-started

works fine if i click on sidebar quick start click

[leesb971204]

I think this is fixed in #511