Merge branch 'fix-com-slack-notify' into 'master'

Fix the .com slack notify

Closes #4995

See merge request gitlab-org/omnibus-gitlab!3890

.gitlab-ci.yml

@@ -152,8 +152,6 @@ notify:slack-fail:
     - /.*-stable(-ee)?$/@gitlab-org/omnibus-gitlab
   except:
     - triggers@gitlab-org/omnibus-gitlab
-  tags:
-  - promotion
   dependencies: []
 notify:slack-fail:scheduled-master: