Upgrade paths

These are valid upgrade paths for Continuous Delivery (CD).

If you're on version...	Upgrade to version...	Notes
5.12.0	You're up to date!
5.x	5.12.0 (current version)
4.26.0 (or later)	5.x (any version in the series)	Follow the migration steps listed in 4.x to 5.x data migration.