style: fix framework jumplinks description visibility

[jahirfiquitiva]

I recently accessed the website and noticed that the frameworks links had a span element that was visible in my 4K monitor.

This PR updates the styles to match tailwind's sr-only class to hide the element visually without hiding it from screen readers

Before	After

[vercel]

@jahirfiquitiva is attempting to deploy a commit to the Formkit Team on Vercel.

A member of the Team first needs to authorize it.