mattermost update to 10.2.0-bb.4

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/mattermost/-/blob/10.2.0-bb.4/CHANGELOG.md

Package MR

big-bang/product/packages/mattermost!284 (merged)

For Issue

Closes big-bang/product/packages/mattermost#186 (closed)

Upgrade Notices

N/A

added botmr mattermost statusdoing labels

assigned to @kershaw.jacob and @pchristiel

changed the description

requested review from @chris.oconnell, @michaelmartin, and @andrewshoell

marked this merge request as ready

changed the description

added statusreview label and removed statusdoing label

changed milestone to %2.45.0

approved this merge request

merged

mentioned in commit 7f4ac88b