Versioned documentation without trailing slash breaks links.

This is a problem that only affects the root documentation, but it seems if you go to https://www.apollographql.com/docs/apollo-server/v2 (without the trailing slash), that none of the sidebar links take you to actual pages — instead they 404.

With the trailing slash (https://www.apollographql.com/docs/apollo-server/v2/), everything works properly.

Reproduce the issue by opening the versioned documentation root with and without the trailing slash, then inspect how the theme generates sidebar links for that root. Done means the sidebar links resolve to actual pages in both URL forms, with no 404s.

Written by the indexing model from the issue text.