Update Ironbank

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/opensource/mattermost/mattermost (source)	patch	11.4.0 -> 11.4.1

Complete MR checklist

Assignee

• 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

Add supporting info below

Pipeline (clean install + upgrade passed): https://repo1.dso.mil/big-bang/product/packages/mattermost/-/pipelines/4974718

Reviewer only

• Tested and Validated changes

Linked Issue: #254 (closed)

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Configuration

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♻️ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

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Upgrade Notices

N/A