README: "Broken" link for "variable font" in description

[Chealer]

The README starts with:

Inter is a typeface carefully crafted & designed for computer screens. Inter features a tall x-height to aid in readability of mixed-case and lower-case text. Inter is a variable font with several OpenType features, like contextual alternates that adjusts punctuation depending on the shape of surrounding glyphs, slashed zero for when you need to disambiguate "0" from "o", tabular numbers, etc.

The "variable font" link brings to a page, but that page does not seem to explain what a variable font is. It seems is has no "variable" anchor.

By the way

Another link on "x-height" (to https://en.wikipedia.org/wiki/X-height) would be appreciated by people clueless about fonts like myself.