Update imperative routing docs to have better a11y (#29382)
Update imperative routing docs to have better a11y (#29382)

We should recommend using a `button` instead of a `span` 👍 
JeromeFitz/next.js,azukaru/next.js,zeit/next.js,azukaru/next.js,JeromeFitz/next.js,azukaru/next.js,zeit/next.js,JeromeFitz/next.js,azukaru/next.js,zeit/next.js,JeromeFitz/next.js