chore: upgrade mattermost

Author: l4rm4nd

examples/mattermost/.env

@@ -14,7 +14,7 @@ RESTART_POLICY=unless-stopped
 ## Please keep in mind this will create a superuser and it's recommended to use a less privileged
 ## user to connect to the database.
 ## A guide on how to change the database user to a nonsuperuser can be found in docs/creation-of-nonsuperuser.md
-POSTGRES_IMAGE_TAG=13-alpine
+POSTGRES_IMAGE_TAG=16-alpine
 #POSTGRES_DATA_PATH=./volumes/db/var/lib/postgresql/data
 POSTGRES_DATA_PATH=${DOCKER_VOLUME_STORAGE:-/mnt/docker-volumes}/mattermost/psql
 POSTGRES_USER=mmuser
@@ -36,7 +36,7 @@ MM_BLEVESETTINGS_INDEXDIR=/mattermost/bleve-indexes
 
 ## This will be 'mattermost-enterprise-edition' or 'mattermost-team-edition' based on the version of Mattermost you're installing.
 MATTERMOST_IMAGE=mattermost-enterprise-edition
-MATTERMOST_IMAGE_TAG=release-9.3
+MATTERMOST_IMAGE_TAG=release-9.11
 
 ## Make Mattermost container readonly. This interferes with the regeneration of root.html inside the container. Only use
 ## it if you know what you're doing.