Update images at quay.io because of security issues

[dmoebius]

What would you like to be added:

Please update the images at https://quay.io/repository/tnozicka/openshift-acme

Why is this needed:

Because the Quay security scanner detects many vulnerabilities in the current images, some with very high priority, e.g. openshift-acme:controller: https://quay.io/repository/tnozicka/openshift-acme/manifest/sha256:66ba5501d62a885eb6edadcb6513b72e7224bfde3d762a427505b9b6d224c8ef?tab=vulnerabilities

The images are based on registry.access.redhat.com/ubi8/ubi-minimal:latest. Maybe they just need a refresh.

@tnozicka