Please tell me if this is the correct thing to do:
1 Upload new files to master node, enter upgrade wizard on master node.
2 Do all the upgrade procedure. Changes that will have to be made in replicated tables will also be made on delivery node.
3 Upload new files to delivery node. Go to upgrade wizard on delivery mode.
4 The wizard will be aware that version is old on this machine. It will try to do the same changes to tables.
5 On some tables on delivery node the changes will be made again (because of replication some changes are already there). Disregarding that, I have to stop MySQL on master node, create a dump, check current binary log index, import dump to delivery node, and execute "CHANGE MASTER TO ..." with the correct index position?