Make Mattermost slash command's trigger word dynamic
Description
If Mattermost has been installed via Omnibus and after installing the “Mattermost slash command” service, the help text still shows a generic /<trigger-word>:
Proposal
Replace the generic /<trigger-word> with the trigger word that is configured for the slash command. This trigger word would have to be dynamically updated if it's changed in Mattermost. Example:
