Merge branch 'mm-5-34-2' into 'master'

Mattermost 5.34.2 Update

Closes platform-one/big-bang/apps/collaboration-tools/mattermost#7

See merge request platform-one/big-bang/bigbang!465

chart/values.yaml

@@ -750,7 +750,7 @@ addons:
     git:
       repo: https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost.git
       path: "./chart"
-      tag: "0.1.4-bb.0"
+      tag: "0.1.5-bb.0"
 
     # -- Flux reconciliation overrides specifically for the Mattermost Package
     flux: {}