blog: release post for v9.7.1 (#1577)
blog: release post for v9.7.1 (#1577)

Refs: https://github.com/nodejs/node/pull/19081

phillipj/new.nodejs.org,yous/new.nodejs.org,nodejs/new.nodejs.org,phillipj/new.nodejs.org,yous/new.nodejs.org,nodejs/new.nodejs.org