Add note to contributing about docs manifest (#36020)
Add note to contributing about docs manifest (#36020)

* Add note to contributing about docs manifest

* Update contributing.md

Co-authored-by: Balázs Orbán <59bd0a3ff43b32849b319e645d4798d8a5d1e889@balazsorban.com>

Co-authored-by: Tim Neutkens <5ee0edb9e2229c0838f1959779f1949031de0123@timneutkens.nl>
Co-authored-by: Balázs Orbán <59bd0a3ff43b32849b319e645d4798d8a5d1e889@balazsorban.com>
JeromeFitz/next.js,JeromeFitz/next.js,JeromeFitz/next.js,JeromeFitz/next.js