Update MM Operator to 1.16.0

Package MR for https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost-operator/-/issues/13

changed milestone to %1.20.0

added Big Bang Add-Ons mattermostoperator priority6 statusreview labels

requested review from @BrandenCobb

assigned to @micah.nagel

added 1 commit

• 0ec9580f - changelog update

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removed Big Bang Add-Ons label

removed priority6 label

removed mattermostoperator label

added 1 commit

• 319c7e7b - readme generate

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approved this merge request

mentioned in commit 3022c04f

merged