Merge branch 'mm-upgrade-to-v5.36.0' into 'master'

Update Mattermost to v 5.36.0

See merge request platform-one/big-bang/bigbang!591

chart/values.yaml

@@ -817,7 +817,7 @@ addons:
     git:
       repo: https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost.git
       path: "./chart"
-      tag: "0.1.6-bb.5"
+      tag: "0.1.6-bb.6"
 
     # -- Flux reconciliation overrides specifically for the Mattermost Package
     flux: {}