Update Ironbank

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/nginx/nginx	patch	1.25.3 -> 1.25.4
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl	patch	v1.28.6 -> v1.28.8
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-aws	patch	v1.9.0 -> v1.9.1
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-microsoft-azure	patch	v1.9.0 -> v1.9.1
velero/velero-plugin-for-aws	patch	v1.9.0 -> v1.9.1

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