chore(deps): update registry1.dso.mil/ironbank/fluxcd/source-controller docker tag to v1.6.1

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/fluxcd/source-controller (source)	patch	v1.6.0 -> v1.6.1

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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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Closes #2784 (closed)

This MR was automatically generated by Renovate Bot.

Upgrade Notices

Flux source controller updated v1.6.0 -> v1.6.1