Update MM Operator to 1.16

chart/values.yaml

@@ -930,7 +930,7 @@ addons:
     git:
       repo: https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost-operator.git
       path: "./chart"
-      tag: "1.15.0-bb.0"
+      tag: "1.16.0-bb.0"
 
     # -- Flux reconciliation overrides specifically for the Mattermost Operator Package
     flux: {}