chore(deps): update registry1.dso.mil/ironbank/big-bang/bbctl docker tag to v2.3.1

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/big-bang/bbctl (source)	minor	2.2.0 -> 2.3.1

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• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
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• Tested and Validated changes

Linked Issue

#352 (closed)

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