Fixed the explanation on how to access multinote mode and melodic step sequencer

In the previous version it said that to access Multinote mode I have to press user mode 2 button until it turns green: that is not correct, the above explanation is how you access the Melodic step sequencer, not how you access the Multinote mode. In order to access the Multinote you have to go to Combined mode and use the 4th scene button to cycle between Combined and Multinote.

I decided to contribute because I had hard time accessing the Melodic step sequencer while using my Launchpad.