Benchmark link is broken

[mikecat]

The destination of "Performance Benchmark "Gulliver's Travels"" link in "Performance Benchmark (Ranking)" section of the README.md on the root (https://nextapps-de.github.io/flexsearch/bench/) is a "Page not found" (404) page.

[Vishtar]

Yeap, that doesn't work: https://github.com/nextapps-de/flexsearch/blob/master/README.md?plain=1#L31

And this benchmark doesn't seem to work: https://nextapps-de.github.io/flexsearch (tried running it in Firefox and Chromium).