Update ensure db IPS

IPS syntax is incorrect for the ensure-anchore-db job template, results in the following error in the current main branch:

Helm upgrade failed: template: anchore-engine/templates/bigbang/db/ensure-anchore-db.yaml:18:11: executing "anchore-engine/templates/bigbang/db/ensure-anchore-db.yaml" at <toYaml>: wrong number of args for toYaml: want 1 got 2