Update RELEASING.md to 1.0.0+ rules
Update RELEASING.md to 1.0.0+ rules

MSP-12646

Ran `metasploit-version install --major 1 --minor 0 --patch 0
--no-bundle-install --ruby-versions ruby-2.1` and took only RELEASING.md
changes.

rapid7/yard-metasploit-erd,rapid7/yard-metasploit-erd