incorrect (?) app name in hardening manifest

This pushes to mongodb-ops-manager-init-appdb, while the upstream chart is expecting mongodb-enterprise-init-appdb.

In hardening_manifest.yaml:

name: "mongodb/mongodb-enterprise/mongodb-ops-manager-init-appdb"

should be

name: "mongodb/mongodb-enterprise/mongodb-enterprise-init-appdb"

I'd submit a merge request, but am getting an error on trying to fork the repository...