Update Mattermost NP for Minio Operator

Package Owner Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/tags/0.2.3-bb.0

https://repo1.dso.mil/platform-one/big-bang/apps/collaboration-tools/mattermost/-/merge_requests/67

Should resolve the couple of recent failures seen in master CI. The minio wait script checks the health status of ALL tenant objects and previously mattermost's tenant was always red due to network policies blocking the operator ingress.