Update ironbank/opensource/nginx/nginx Docker tag to v1.29.0

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/nginx/nginx (source)	minor	1.28.0 -> 1.29.0
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-aws	minor	1.12.1 -> 1.13.0
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-microsoft-azure	minior	1.12.1 -> 1.13.0

Complete MR checklist

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• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
• Tested and Validated Changes made with supporting info like logs or screenshots from test pipelines

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• Tested and Validated changes

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Linked Issue

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Upgrade Notices

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