[Integrated] RFR: 253: Add note about git-publish to README

[Erik Helin]

Changeset: ca9b2d4f
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-02-03 10:40:30 +0000
URL:       https://git.openjdk.java.net/skara/commit/ca9b2d4f

253: Add note about git-publish to README

Reviewed-by: rwestberg

! README.md