Update next/link API docs to mention a11y and ESLint rule.

[leerob]

Based on feedback from Twitter.

https://twitter.com/marcysutton/status/1431432062506917890

[ijjk]

Failing test suites

Commit: 61b620e

test/acceptance/ReactRefreshLogBox.dev.test.js

• logbox: can recover from a syntax error without losing state

Expand output

● logbox: can recover from a syntax error without losing state

expect(received).toBe(expected) // Object.is equality

Expected: "Count: 1"
Received: "1"

  46 |       import { useCallback, useState } from 'react'
  47 |
> 48 |       export default function Index() {
     |        ^
  49 |         const [count, setCount] = useState(0)
  50 |         const increment = useCallback(() => setCount(c => c + 1), [setCount])
  51 |         return (

  at Object.<anonymous> (acceptance/ReactRefreshLogBox.dev.test.js:48:8)