keys returns a map's keys in Go's randomized iteration order, so a
release with several databases rendered DEFINED_DBS in a different
order on each upgrade. The init-script Secret, and the checksum the
init Job carries, then changed on upgrades that left the databases
untouched, which makes a no-op upgrade look like a real change in the
release history.
Assisted-by: LLM
Signed-off-by: Mattia Eleuteri <mattia@hidora.io>