Document the changelog check in README (#1993)
Document the changelog check in README (#1993)

Follow-up to https://github.com/puma/puma/pull/1991
puma/puma,puma/puma,eileencodes/puma,looker/puma,looker/puma,eileencodes/puma,looker/puma,puma/puma,eileencodes/puma,eileencodes/puma,puma/puma,looker/puma