Update Ironbank Docker tags

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/velero/velero	patch	v1.8.0 -> v1.8.1
registry1.dso.mil/ironbank/opensource/velero/velero	patch	1.8.0 -> v1.8.1
registry1.dso.mil/ironbank/opensource/velero/velero	patch	v1.8.0 -> v1.8.1
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-aws	patch	v1.4.0 -> v1.4.1
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-microsoft-azure	patch	v1.4.0 -> v1.4.1
velero/velero-restic-restore-helper	patch	v1.8.0 -> v1.8.1

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