Merge branch 'docs/add-configuration-team-to-the-list' into 'master'

Add Configuration team to the list

See merge request gitlab-org/gitlab-ce!19416

CONTRIBUTING.md

@@ -182,7 +182,7 @@ Assigning a team label makes sure issues get the attention of the appropriate
 people.
 The current team labels are ~Distribution, ~"CI/CD", ~Discussion, ~Documentation, ~Quality,
-~Geo, ~Gitaly, ~Monitoring, ~Platform, ~Release, ~"Security Products" and ~"UX".
+~Geo, ~Gitaly, ~Monitoring, ~Platform, ~Release, ~"Security Products", ~"Configuration", and ~"UX".
 The descriptions on the [labels page][labels-page] explain what falls under the
 responsibility of each team.