mattermost update to 11.0.4-bb.2

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/mattermost/-/blob/11.0.4-bb.2/CHANGELOG.md

Package MR

big-bang/product/packages/mattermost!334 (merged)

big-bang/product/packages/mattermost!336 (merged)

For Issue

Closes big-bang/product/packages/mattermost#226 (closed)

Closes big-bang/product/packages/mattermost#232 (closed)

Upgrade Notices

N/A