Update Protocol.md
Update Protocol.md

The fade action time seems to be in milliseconds rather than seconds
magicmonkey/lifxjs,ppelleti/lifxjs,sinnottj/lifxjs,WigWagCo/lifxjs,WigWagCo/lifxjs,magicmonkey/lifxjs,wiegraff13/lifxjs,wiegraff13/lifxjs,sinnottj/lifxjs,ppelleti/lifxjs