Update registry1.dso.mil/ironbank/redhat/ubi/ubi8 Docker tag to v8.7

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/redhat/ubi/ubi8	ironbank-base	minor	8.6 -> 8.7
registry1.dso.mil/ironbank/redhat/ubi/ubi8	final	minor	8.5 -> 8.7

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