Update Ironbank to v2.7.1

This MR contains the following updates:

Package	Update	Change
ironbank/big-bang/argocd	minor	v2.6.7 -> v2.7.1
registry1.dso.mil/ironbank/big-bang/argocd	minor	v2.6.7 -> v2.7.1

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relates to #80 (closed)