Add index.md to link in integrations/mattermost_slash_commands.md
Add index.md to link in doc/user/project/integrations/mattermost_slash_commands.md
Related to #369076 (closed)
Edited by Marcel Amirault
Add index.md to link in doc/user/project/integrations/mattermost_slash_commands.md
Related to #369076 (closed)