update base image to: redhat/ubi/ubi8 version 8.5

What is your Merge about?

This changes the base image to: redhat/ubi/ubi8 8.5

The scan results are the same as they were with the prior base image: redhat/ubi/ubi8 8.4

We are updating to use the new redhat/ubi/ubi8, which was approved for use while we were preparing our last request for approval.

For more information please visit our Contributor Onboarding Guide.