Merge branch '287667-vale-substitutions-gitlabbers' into 'master'

Docs: add "GitLabbers" to Vale substitutions list

See merge request gitlab-org/gitlab!49540

doc/.vale/gitlab/Substitutions.yml

@@ -14,6 +14,7 @@ swap:
   Customer [Pp]ortal: Customers Portal
   frontmatter: front matter
   GitLabber: GitLab team member
+  GitLabbers: GitLab team members
   GitLab-shell: GitLab Shell
   gitlab omnibus: Omnibus GitLab
   param: parameter