Update Ironbank Docker tags to v0.0.4

This MR contains the following updates:

Package	Update	Change
ironbank/bigbang/cluster-auditor/opa-exporter	patch	0.0.3 -> v0.0.4
registry1.dso.mil/ironbank/bigbang/cluster-auditor/opa-exporter	patch	v0.0.3 -> v0.0.4

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