Update Mattermost to 6.7.0

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/blob/6.7.0-bb.0/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/merge_requests/91

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/issues/48

added mattermost statusreview labels

assigned to @project_2872_bot2

changed the description

requested review from @micah.nagel, @BrandenCobb, and @ryan.j.garcia

marked this merge request as ready

changed title from Draft: Updated mattermost git tag to Update Mattermost to 6.7.0

changed the description

assigned to @micah.nagel

changed milestone to %1.35.0

approved this merge request

merged

mentioned in commit 23715a26