Mention nesting in arrays alongside Fragments in next/head docs (#12420)
Mention nesting in arrays alongside Fragments in next/head docs (#12420)

Co-authored-by: Tim Neutkens <5ee0edb9e2229c0838f1959779f1949031de0123@timneutkens.nl>
Co-authored-by: Joe Haddad <9a59834641c3efaef8f42337ff0c7967b38f1c43@zeit.co>
azukaru/next.js,flybayer/next.js,flybayer/next.js,zeit/next.js,azukaru/next.js,JeromeFitz/next.js,zeit/next.js,zeit/next.js,JeromeFitz/next.js,azukaru/next.js,JeromeFitz/next.js,JeromeFitz/next.js,flybayer/next.js,azukaru/next.js,flybayer/next.js